20900892 has 12 divisors (see below), whose sum is σ = 48768776. Its totient is φ = 6966960.

The previous prime is 20900879. The next prime is 20900897. The reversal of 20900892 is 29800902.

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900897) 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, 870859 + ... + 870882.

Almost surely, 2^20900892 is an apocalyptic number.

It is an amenable number.

20900892 is an abundant number, since it is smaller than the sum of its proper divisors (27867884).

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

20900892 is a wasteful number, since it uses less digits than its factorization.

20900892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741748 (or 1741746 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20900892 is about 4571.7493369606. The cubic root of 20900892 is about 275.4577148835.

The spelling of 20900892 in words is "twenty million, nine hundred thousand, eight hundred ninety-two".