180834996921 has 32 divisors (see below), whose sum is σ = 257855875200. Its totient is φ = 112518443520.

The previous prime is 180834996899. The next prime is 180834996929. The reversal of 180834996921 is 129699438081.

It is not a de Polignac number, because 180834996921 - 2²¹ = 180832899769 is a prime.

It is a super-2 number, since 2×180834996921² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (180834996929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156250 + ... + 621356.

It is an arithmetic number, because the mean of its divisors is an integer number (8057996100).

Almost surely, 2^180834996921 is an apocalyptic number.

It is an amenable number.

180834996921 is a deficient number, since it is larger than the sum of its proper divisors (77020878279).

180834996921 is a wasteful number, since it uses less digits than its factorization.

180834996921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465289.

The product of its (nonzero) digits is 6718464, while the sum is 60.

The spelling of 180834996921 in words is "one hundred eighty billion, eight hundred thirty-four million, nine hundred ninety-six thousand, nine hundred twenty-one".