20909676 has 12 divisors (see below), whose sum is σ = 48789272. Its totient is φ = 6969888.

The previous prime is 20909657. The next prime is 20909701. The reversal of 20909676 is 67690902.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871225 + ... + 871248.

Almost surely, 2^20909676 is an apocalyptic number.

It is an amenable number.

20909676 is an abundant number, since it is smaller than the sum of its proper divisors (27879596).

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

20909676 is a wasteful number, since it uses less digits than its factorization.

20909676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742480 (or 1742478 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 20909676 is about 4572.7099186369. The cubic root of 20909676 is about 275.4962982716.

The spelling of 20909676 in words is "twenty million, nine hundred nine thousand, six hundred seventy-six".