20924680 has 32 divisors (see below), whose sum is σ = 53807040. Its totient is φ = 7174080.

The previous prime is 20924639. The next prime is 20924693. The reversal of 20924680 is 8642902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37086 + ... + 37645.

It is an arithmetic number, because the mean of its divisors is an integer number (1681470).

Almost surely, 2^20924680 is an apocalyptic number.

20924680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20924680 is an abundant number, since it is smaller than the sum of its proper divisors (32882360).

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

20924680 is a wasteful number, since it uses less digits than its factorization.

20924680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74749 (or 74745 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20924680 is about 4574.3502270814. The cubic root of 20924680 is about 275.5621777901.

The spelling of 20924680 in words is "twenty million, nine hundred twenty-four thousand, six hundred eighty".