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20143625 = 53161149
BaseRepresentation
bin100110011010…
…1111000001001
31101220101212012
41030311320021
520124044000
61555425305
7333134525
oct114657011
941811765
1020143625
1110409227
1268b5235
134233908
142964d85
151b7d735
hex1335e09

20143625 has 8 divisors (see below), whose sum is σ = 25139400. Its totient is φ = 16114800.

The previous prime is 20143621. The next prime is 20143631. The reversal of 20143625 is 52634102.

It can be written as a sum of positive squares in 4 ways, for example, as 4239481 + 15904144 = 2059^2 + 3988^2 .

It is not a de Polignac number, because 20143625 - 22 = 20143621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20143625.

It is not an unprimeable number, because it can be changed into a prime (20143621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80450 + ... + 80699.

It is an arithmetic number, because the mean of its divisors is an integer number (3142425).

Almost surely, 220143625 is an apocalyptic number.

20143625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20143625 is a deficient number, since it is larger than the sum of its proper divisors (4995775).

20143625 is an equidigital number, since it uses as much as digits as its factorization.

20143625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161164 (or 161154 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20143625 is about 4488.1649925109. The cubic root of 20143625 is about 272.0899761803.

Adding to 20143625 its reverse (52634102), we get a palindrome (72777727).

The spelling of 20143625 in words is "twenty million, one hundred forty-three thousand, six hundred twenty-five".

Divisors: 1 5 25 125 161149 805745 4028725 20143625