20136512 has 28 divisors (see below), whose sum is σ = 43592496. Its totient is φ = 9152640.

The previous prime is 20136511. The next prime is 20136541. The reversal of 20136512 is 21563102.

It is a super-2 number, since 2×20136512² = 810958231052288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20136511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13598 + ... + 15005.

Almost surely, 2^20136512 is an apocalyptic number.

20136512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20136512 is an abundant number, since it is smaller than the sum of its proper divisors (23455984).

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

20136512 is a wasteful number, since it uses less digits than its factorization.

20136512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28626 (or 28616 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20136512 is about 4487.3725051527. The cubic root of 20136512 is about 272.0579461319.

Adding to 20136512 its reverse (21563102), we get a palindrome (41699614).

The spelling of 20136512 in words is "twenty million, one hundred thirty-six thousand, five hundred twelve".