20958936 has 32 divisors (see below), whose sum is σ = 52758000. Its totient is φ = 6938240.

The previous prime is 20958907. The next prime is 20958941. The reversal of 20958936 is 63985902.

It is a congruent number.

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, 646 + ... + 6506.

Almost surely, 2^20958936 is an apocalyptic number.

It is an amenable number.

20958936 is an abundant number, since it is smaller than the sum of its proper divisors (31799064).

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

20958936 is a wasteful number, since it uses less digits than its factorization.

20958936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6019 (or 6015 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 20958936 is about 4578.0930527896. The cubic root of 20958936 is about 275.7124709908.

The spelling of 20958936 in words is "twenty million, nine hundred fifty-eight thousand, nine hundred thirty-six".