13426815492 has 36 divisors (see below), whose sum is σ = 35936478396. Its totient is φ = 4212334080.

The previous prime is 13426815491. The next prime is 13426815497. The reversal of 13426815492 is 29451862431.

13426815492 is a `hidden beast` number, since 1 + 3 + 4 + 26 + 81 + 549 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9240207876 + 4186607616 = 96126^2 + 64704^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×13426815492² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13426815491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10969009 + ... + 10970232.

It is an arithmetic number, because the mean of its divisors is an integer number (998235511).

Almost surely, 2^13426815492 is an apocalyptic number.

13426815492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13426815492 is an abundant number, since it is smaller than the sum of its proper divisors (22509662904).

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

13426815492 is a wasteful number, since it uses less digits than its factorization.

13426815492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21939268 (or 21939263 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 13426815492 in words is "thirteen billion, four hundred twenty-six million, eight hundred fifteen thousand, four hundred ninety-two".