13426487181 has 20 divisors (see below), whose sum is σ = 20179919232. Its totient is φ = 8896068648.

The previous prime is 13426487101. The next prime is 13426487233. The reversal of 13426487181 is 18178462431.

13426487181 is a `hidden beast` number, since 1 + 3 + 426 + 48 + 7 + 181 = 666.

It is not a de Polignac number, because 13426487181 - 2³⁰ = 12352745357 is a prime.

It is a super-2 number, since 2×13426487181² (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 (13426487101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 495261 + ... + 521666.

Almost surely, 2^13426487181 is an apocalyptic number.

It is an amenable number.

13426487181 is a deficient number, since it is larger than the sum of its proper divisors (6753432051).

13426487181 is a wasteful number, since it uses less digits than its factorization.

13426487181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017102 (or 1017093 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

It can be divided in two parts, 134264 and 87181, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 13426487181 in words is "thirteen billion, four hundred twenty-six million, four hundred eighty-seven thousand, one hundred eighty-one".