20995236 has 36 divisors (see below), whose sum is σ = 53212432. Its totient is φ = 6979824.

The previous prime is 20995231. The next prime is 20995237. The reversal of 20995236 is 63259902.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 20995236.

It is not an unprimeable number, because it can be changed into a prime (20995231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22695 + ... + 23601.

Almost surely, 2^20995236 is an apocalyptic number.

It is an amenable number.

20995236 is an abundant number, since it is smaller than the sum of its proper divisors (32217196).

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

20995236 is a wasteful number, since it uses less digits than its factorization.

20995236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 20995236 is about 4582.0558704582. The cubic root of 20995236 is about 275.8715533384.

The spelling of 20995236 in words is "twenty million, nine hundred ninety-five thousand, two hundred thirty-six".