20399704958 has 48 divisors (see below), whose sum is σ = 33589935360. Its totient is φ = 9279144000.

The previous prime is 20399704951. The next prime is 20399704967. The reversal of 20399704958 is 85940799302.

It is a super-2 number, since 2×20399704958² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20399704951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3996608 + ... + 4001708.

It is an arithmetic number, because the mean of its divisors is an integer number (699790320).

Almost surely, 2^20399704958 is an apocalyptic number.

20399704958 is a deficient number, since it is larger than the sum of its proper divisors (13190230402).

20399704958 is a wasteful number, since it uses less digits than its factorization.

20399704958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361 (or 5342 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 20399704958 in words is "twenty billion, three hundred ninety-nine million, seven hundred four thousand, nine hundred fifty-eight".