13421957976 has 96 divisors (see below), whose sum is σ = 41617804800. Its totient is φ = 3828047040.

The previous prime is 13421957953. The next prime is 13421958001. The reversal of 13421957976 is 67975912431.

13421957976 is a `hidden beast` number, since 13 + 42 + 19 + 579 + 7 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264465 + ... + 311103.

It is an arithmetic number, because the mean of its divisors is an integer number (433518800).

Almost surely, 2^13421957976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13421957976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20808902400).

13421957976 is an abundant number, since it is smaller than the sum of its proper divisors (28195846824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13421957976 is a wasteful number, since it uses less digits than its factorization.

13421957976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47229 (or 47222 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The spelling of 13421957976 in words is "thirteen billion, four hundred twenty-one million, nine hundred fifty-seven thousand, nine hundred seventy-six".