20634416 has 20 divisors (see below), whose sum is σ = 43614024. Its totient is φ = 9379200.

The previous prime is 20634407. The next prime is 20634421. The reversal of 20634416 is 61443602.

It is a super-2 number, since 2×20634416² = 851558247322112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58445 + ... + 58796.

Almost surely, 2^20634416 is an apocalyptic number.

It is an amenable number.

20634416 is an abundant number, since it is smaller than the sum of its proper divisors (22979608).

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

20634416 is a wasteful number, since it uses less digits than its factorization.

20634416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117260 (or 117254 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20634416 is about 4542.5120803362. The cubic root of 20634416 is about 274.2820545560.

It can be divided in two parts, 20 and 634416, that added together give a palindrome (634436).

The spelling of 20634416 in words is "twenty million, six hundred thirty-four thousand, four hundred sixteen".