13421685904 has 45 divisors (see below), whose sum is σ = 28594336729. Its totient is φ = 6098449280.

The previous prime is 13421685889. The next prime is 13421685911. The reversal of 13421685904 is 40958612431.

The square root of 13421685904 is 115852.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2195859600 + 11225826304 = 46860^2 + 105952^2 .

It is a super-3 number, since 3×13421685904³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5096172 + ... + 5098804.

Almost surely, 2^13421685904 is an apocalyptic number.

13421685904 is the 115852-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13421685904

13421685904 is an abundant number, since it is smaller than the sum of its proper divisors (15172650825).

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

13421685904 is an frugal number, since it uses more digits than its factorization.

13421685904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296 (or 2646 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 13421685904 in words is "thirteen billion, four hundred twenty-one million, six hundred eighty-five thousand, nine hundred four".