20936216 has 16 divisors (see below), whose sum is σ = 44863440. Its totient is φ = 8972640.

The previous prime is 20936207. The next prime is 20936239. The reversal of 20936216 is 61263902.

It is a congruent number.

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, 186875 + ... + 186986.

It is an arithmetic number, because the mean of its divisors is an integer number (2803965).

Almost surely, 2^20936216 is an apocalyptic number.

It is an amenable number.

20936216 is an abundant number, since it is smaller than the sum of its proper divisors (23927224).

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

20936216 is a wasteful number, since it uses less digits than its factorization.

20936216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373874 (or 373870 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20936216 is about 4575.6109974516. The cubic root of 20936216 is about 275.6128086126.

The spelling of 20936216 in words is "twenty million, nine hundred thirty-six thousand, two hundred sixteen".