20634308 has 24 divisors (see below), whose sum is σ = 37461312. Its totient is φ = 9936864.

The previous prime is 20634293. The next prime is 20634319. The reversal of 20634308 is 80343602.

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 7 ways as a sum of consecutive naturals, for example, 15185 + ... + 16487.

It is an arithmetic number, because the mean of its divisors is an integer number (1560888).

Almost surely, 2^20634308 is an apocalyptic number.

It is an amenable number.

20634308 is a deficient number, since it is larger than the sum of its proper divisors (16827004).

20634308 is a wasteful number, since it uses less digits than its factorization.

20634308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451 (or 1449 counting only the distinct ones).

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

The square root of 20634308 is about 4542.5001926252. The cubic root of 20634308 is about 274.2815760268.

The spelling of 20634308 in words is "twenty million, six hundred thirty-four thousand, three hundred eight".