20626636 has 24 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 9987600.

The previous prime is 20626633. The next prime is 20626637. The reversal of 20626636 is 63662602.

It is a super-2 number, since 2×20626636² = 850916225352992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20626598 and 20626607.

It is not an unprimeable number, because it can be changed into a prime (20626633) 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, 16141 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^20626636 is an apocalyptic number.

It is an amenable number.

20626636 is a deficient number, since it is larger than the sum of its proper divisors (16629044).

20626636 is a wasteful number, since it uses less digits than its factorization.

20626636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20626636 is about 4541.6556452466. The cubic root of 20626636 is about 274.2475784550.

The spelling of 20626636 in words is "twenty million, six hundred twenty-six thousand, six hundred thirty-six".