18914441634 has 24 divisors (see below), whose sum is σ = 44706862512. Its totient is φ = 5731648920.

The previous prime is 18914441573. The next prime is 18914441641. The reversal of 18914441634 is 43614441981.

18914441634 is a `hidden beast` number, since 1 + 8 + 9 + 1 + 4 + 4 + 4 + 1 + 634 = 666.

It is a super-2 number, since 2×18914441634² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18914441634.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47763544 + ... + 47763939.

It is an arithmetic number, because the mean of its divisors is an integer number (1862785938).

Almost surely, 2^18914441634 is an apocalyptic number.

18914441634 is an abundant number, since it is smaller than the sum of its proper divisors (25792420878).

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

18914441634 is a wasteful number, since it uses less digits than its factorization.

18914441634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95527502 (or 95527499 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 18914441634 in words is "eighteen billion, nine hundred fourteen million, four hundred forty-one thousand, six hundred thirty-four".