13405921976 has 32 divisors (see below), whose sum is σ = 26060361600. Its totient is φ = 6458382720.

The previous prime is 13405921937. The next prime is 13405921981. The reversal of 13405921976 is 67912950431.

It is a self number, because there is not a number n which added to its sum of digits gives 13405921976.

It is a congruent number.

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, 61235 + ... + 174818.

It is an arithmetic number, because the mean of its divisors is an integer number (814386300).

Almost surely, 2^13405921976 is an apocalyptic number.

It is an amenable number.

13405921976 is a deficient number, since it is larger than the sum of its proper divisors (12654439624).

13405921976 is a wasteful number, since it uses less digits than its factorization.

13405921976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236319 (or 236315 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 13405921976 in words is "thirteen billion, four hundred five million, nine hundred twenty-one thousand, nine hundred seventy-six".