20256925 has 24 divisors (see below), whose sum is σ = 27291656. Its totient is φ = 14826240.

The previous prime is 20256889. The next prime is 20256931. The reversal of 20256925 is 52965202.

It can be written as a sum of positive squares in 12 ways, for example, as 9406489 + 10850436 = 3067^2 + 3294^2 .

It is not a de Polignac number, because 20256925 - 2¹³ = 20248733 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 23 ways as a sum of consecutive naturals, for example, 50827 + ... + 51223.

Almost surely, 2^20256925 is an apocalyptic number.

20256925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20256925 is a deficient number, since it is larger than the sum of its proper divisors (7034731).

20256925 is a wasteful number, since it uses less digits than its factorization.

20256925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 20256925 is about 4500.7693786729. The cubic root of 20256925 is about 272.5991559025.

The spelling of 20256925 in words is "twenty million, two hundred fifty-six thousand, nine hundred twenty-five".