20870892 has 96 divisors (see below), whose sum is σ = 65139200. Its totient is φ = 5645376.

The previous prime is 20870887. The next prime is 20870909. The reversal of 20870892 is 29807802.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13638 + ... + 15090.

Almost surely, 2^20870892 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 20870892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32569600).

20870892 is an abundant number, since it is smaller than the sum of its proper divisors (44268308).

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

20870892 is a wasteful number, since it uses less digits than its factorization.

20870892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 20870892 is about 4568.4671389866. The cubic root of 20870892 is about 275.3258594525.

The spelling of 20870892 in words is "twenty million, eight hundred seventy thousand, eight hundred ninety-two".