20572236 has 36 divisors (see below), whose sum is σ = 52215072. Its totient is φ = 6829344.

The previous prime is 20572219. The next prime is 20572241. The reversal of 20572236 is 63227502.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8941 + ... + 11003.

Almost surely, 2^20572236 is an apocalyptic number.

It is an amenable number.

20572236 is an abundant number, since it is smaller than the sum of its proper divisors (31642836).

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

20572236 is a wasteful number, since it uses less digits than its factorization.

20572236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20572236 is about 4535.6626858707. The cubic root of 20572236 is about 274.0062690593.

Adding to 20572236 its reverse (63227502), we get a palindrome (83799738).

The spelling of 20572236 in words is "twenty million, five hundred seventy-two thousand, two hundred thirty-six".