20938668562 has 64 divisors (see below), whose sum is σ = 39972372480. Its totient is φ = 8014761216.

The previous prime is 20938668503. The next prime is 20938668577. The reversal of 20938668562 is 26586683902.

It is a super-2 number, since 2×20938668562² (a number of 21 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 680139 + ... + 710257.

It is an arithmetic number, because the mean of its divisors is an integer number (624568320).

Almost surely, 2^20938668562 is an apocalyptic number.

20938668562 is a deficient number, since it is larger than the sum of its proper divisors (19033703918).

20938668562 is a wasteful number, since it uses less digits than its factorization.

20938668562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30295.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 20938668562 in words is "twenty billion, nine hundred thirty-eight million, six hundred sixty-eight thousand, five hundred sixty-two".