18941296436 has 12 divisors (see below), whose sum is σ = 35097108228. Its totient is φ = 8913551232.

The previous prime is 18941296417. The next prime is 18941296483. The reversal of 18941296436 is 63469214981.

It can be written as a sum of positive squares in 2 ways, for example, as 9514051600 + 9427244836 = 97540^2 + 97094^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139274171 + ... + 139274306.

It is an arithmetic number, because the mean of its divisors is an integer number (2924759019).

Almost surely, 2^18941296436 is an apocalyptic number.

It is an amenable number.

18941296436 is a deficient number, since it is larger than the sum of its proper divisors (16155811792).

18941296436 is a wasteful number, since it uses less digits than its factorization.

18941296436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278548498 (or 278548496 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The spelling of 18941296436 in words is "eighteen billion, nine hundred forty-one million, two hundred ninety-six thousand, four hundred thirty-six".