20152636 has 24 divisors (see below), whose sum is σ = 40491360. Its totient is φ = 8596992.

The previous prime is 20152621. The next prime is 20152703. The reversal of 20152636 is 63625102.

It is a super-2 number, since 2×20152636² = 812257475496992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20152636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4980 + ... + 8068.

It is an arithmetic number, because the mean of its divisors is an integer number (1687140).

Almost surely, 2^20152636 is an apocalyptic number.

It is an amenable number.

20152636 is an abundant number, since it is smaller than the sum of its proper divisors (20338724).

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

20152636 is a wasteful number, since it uses less digits than its factorization.

20152636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3331 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20152636 is about 4489.1687426516. The cubic root of 20152636 is about 272.1305421538.

Adding to 20152636 its reverse (63625102), we get a palindrome (83777738).

The spelling of 20152636 in words is "twenty million, one hundred fifty-two thousand, six hundred thirty-six".