20929804 has 12 divisors (see below), whose sum is σ = 41859664. Its totient is φ = 8969904.

The previous prime is 20929789. The next prime is 20929807. The reversal of 20929804 is 40892902.

20929804 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20929804.

It is not an unprimeable number, because it can be changed into a prime (20929807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373719 + ... + 373774.

Almost surely, 2^20929804 is an apocalyptic number.

It is an amenable number.

20929804 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20929804 is a wasteful number, since it uses less digits than its factorization.

20929804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747504 (or 747502 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20929804 is about 4574.9102723441. The cubic root of 20929804 is about 275.5846690199.

The spelling of 20929804 in words is "twenty million, nine hundred twenty-nine thousand, eight hundred four".