20828415938 has 16 divisors (see below), whose sum is σ = 34875488736. Its totient is φ = 9247287840.

The previous prime is 20828415913. The next prime is 20828415947. The reversal of 20828415938 is 83951482802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11007731 + ... + 11009622.

It is an arithmetic number, because the mean of its divisors is an integer number (2179718046).

Almost surely, 2^20828415938 is an apocalyptic number.

20828415938 is a deficient number, since it is larger than the sum of its proper divisors (14047072798).

20828415938 is a wasteful number, since it uses less digits than its factorization.

20828415938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22017409.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 20828415938 in words is "twenty billion, eight hundred twenty-eight million, four hundred fifteen thousand, nine hundred thirty-eight".