20713582918 has 48 divisors (see below), whose sum is σ = 38840543280. Its totient is φ = 8230311936.

The previous prime is 20713582873. The next prime is 20713582937. The reversal of 20713582918 is 81928531702.

It is a happy number.

It is a super-2 number, since 2×20713582918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 18838 + ... + 204406.

It is an arithmetic number, because the mean of its divisors is an integer number (809177985).

Almost surely, 2^20713582918 is an apocalyptic number.

20713582918 is a deficient number, since it is larger than the sum of its proper divisors (18126960362).

20713582918 is a wasteful number, since it uses less digits than its factorization.

20713582918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185669 (or 185662 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 20713582918 in words is "twenty billion, seven hundred thirteen million, five hundred eighty-two thousand, nine hundred eighteen".