20925560 has 32 divisors (see below), whose sum is σ = 47412000. Its totient is φ = 8311680.

The previous prime is 20925533. The next prime is 20925571. The reversal of 20925560 is 6552902.

It is a super-2 number, since 2×20925560² = 875758122627200, which contains 22 as substring.

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, 4205 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (1481625).

Almost surely, 2^20925560 is an apocalyptic number.

20925560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20925560 is an abundant number, since it is smaller than the sum of its proper divisors (26486440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20925560 is a wasteful number, since it uses less digits than its factorization.

20925560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671 (or 3667 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20925560 is about 4574.4464145949. The cubic root of 20925560 is about 275.5660407137.

The spelling of 20925560 in words is "twenty million, nine hundred twenty-five thousand, five hundred sixty".