20900946 has 16 divisors (see below), whose sum is σ = 45602208. Its totient is φ = 6333600.

The previous prime is 20900933. The next prime is 20900981. The reversal of 20900946 is 64900902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158275 + ... + 158406.

It is an arithmetic number, because the mean of its divisors is an integer number (2850138).

Almost surely, 2^20900946 is an apocalyptic number.

20900946 is an abundant number, since it is smaller than the sum of its proper divisors (24701262).

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

20900946 is a wasteful number, since it uses less digits than its factorization.

20900946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316697.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20900946 is about 4571.7552427924. The cubic root of 20900946 is about 275.4579521095.

The spelling of 20900946 in words is "twenty million, nine hundred thousand, nine hundred forty-six".