20889125 has 8 divisors (see below), whose sum is σ = 26069784. Its totient is φ = 16711200.

The previous prime is 20889109. The next prime is 20889137. The reversal of 20889125 is 52198802.

It can be written as a sum of positive squares in 4 ways, for example, as 1800964 + 19088161 = 1342^2 + 4369^2 .

It is not a de Polignac number, because 20889125 - 2⁴ = 20889109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83432 + ... + 83681.

It is an arithmetic number, because the mean of its divisors is an integer number (3258723).

Almost surely, 2^20889125 is an apocalyptic number.

20889125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20889125 is a deficient number, since it is larger than the sum of its proper divisors (5180659).

20889125 is an equidigital number, since it uses as much as digits as its factorization.

20889125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167128 (or 167118 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 20889125 is about 4570.4622304533. The cubic root of 20889125 is about 275.4060118367.

The spelling of 20889125 in words is "twenty million, eight hundred eighty-nine thousand, one hundred twenty-five".