20925880 has 32 divisors (see below), whose sum is σ = 47219040. Its totient is φ = 8346240.

The previous prime is 20925847. The next prime is 20925881. The reversal of 20925880 is 8852902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20925881) 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, 21157 + ... + 22123.

It is an arithmetic number, because the mean of its divisors is an integer number (1475595).

Almost surely, 2^20925880 is an apocalyptic number.

20925880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20925880 is an abundant number, since it is smaller than the sum of its proper divisors (26293160).

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

20925880 is a wasteful number, since it uses less digits than its factorization.

20925880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 20925880 is about 4574.4813913710. The cubic root of 20925880 is about 275.5674453863.

The spelling of 20925880 in words is "twenty million, nine hundred twenty-five thousand, eight hundred eighty".