20924928 has 120 divisors (see below), whose sum is σ = 63835200. Its totient is φ = 6580224.

The previous prime is 20924903. The next prime is 20924941. The reversal of 20924928 is 82942902.

It is a super-2 number, since 2×20924928² = 875705223610368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20924892 and 20924901.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87433 + ... + 87671.

It is an arithmetic number, because the mean of its divisors is an integer number (531960).

Almost surely, 2^20924928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20924928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31917600).

20924928 is an abundant number, since it is smaller than the sum of its proper divisors (42910272).

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

20924928 is a wasteful number, since it uses less digits than its factorization.

20924928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20924928 is about 4574.3773346763. The cubic root of 20924928 is about 275.5632664432.

The spelling of 20924928 in words is "twenty million, nine hundred twenty-four thousand, nine hundred twenty-eight".