20876636 has 24 divisors (see below), whose sum is σ = 41232240. Its totient is φ = 9161600.

The previous prime is 20876633. The next prime is 20876651. The reversal of 20876636 is 63667802.

It is a self number, because there is not a number n which added to its sum of digits gives 20876636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20876633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6905 + ... + 9456.

It is an arithmetic number, because the mean of its divisors is an integer number (1718010).

Almost surely, 2^20876636 is an apocalyptic number.

It is an amenable number.

20876636 is a deficient number, since it is larger than the sum of its proper divisors (20355604).

20876636 is a wasteful number, since it uses less digits than its factorization.

20876636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16405 (or 16403 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 20876636 is about 4569.0957529910. The cubic root of 20876636 is about 275.3511151479.

It can be divided in two parts, 208766 and 36, that added together give a palindrome (208802).

The spelling of 20876636 in words is "twenty million, eight hundred seventy-six thousand, six hundred thirty-six".