20152625 has 8 divisors (see below), whose sum is σ = 25150632. Its totient is φ = 16122000.

The previous prime is 20152621. The next prime is 20152703. The reversal of 20152625 is 52625102.

It can be written as a sum of positive squares in 4 ways, for example, as 234256 + 19918369 = 484^2 + 4463^2 .

It is not a de Polignac number, because 20152625 - 2² = 20152621 is a prime.

It is a super-2 number, since 2×20152625² = 812256588781250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20152625.

It is not an unprimeable number, because it can be changed into a prime (20152621) 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, 80486 + ... + 80735.

It is an arithmetic number, because the mean of its divisors is an integer number (3143829).

Almost surely, 2^20152625 is an apocalyptic number.

20152625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20152625 is a deficient number, since it is larger than the sum of its proper divisors (4998007).

20152625 is an equidigital number, since it uses as much as digits as its factorization.

20152625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161236 (or 161226 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20152625 is about 4489.1675174803. The cubic root of 20152625 is about 272.1304926410.

Adding to 20152625 its reverse (52625102), we get a palindrome (72777727).

The spelling of 20152625 in words is "twenty million, one hundred fifty-two thousand, six hundred twenty-five".