20922828 has 12 divisors (see below), whose sum is σ = 48819960. Its totient is φ = 6974272.

The previous prime is 20922823. The next prime is 20922829. The reversal of 20922828 is 82822902.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20922821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871773 + ... + 871796.

It is an arithmetic number, because the mean of its divisors is an integer number (4068330).

Almost surely, 2^20922828 is an apocalyptic number.

It is an amenable number.

20922828 is an abundant number, since it is smaller than the sum of its proper divisors (27897132).

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

20922828 is a wasteful number, since it uses less digits than its factorization.

20922828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743576 (or 1743574 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20922828 is about 4574.1477894795. The cubic root of 20922828 is about 275.5540477381.

The spelling of 20922828 in words is "twenty million, nine hundred twenty-two thousand, eight hundred twenty-eight".