18494970624 has 432 divisors, whose sum is σ = 60327106560. Its totient is φ = 5585448960.

The previous prime is 18494970623. The next prime is 18494970631. The reversal of 18494970624 is 42607949481.

18494970624 is a `hidden beast` number, since 1 + 8 + 4 + 9 + 4 + 9 + 7 + 0 + 624 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18494970623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82936977 + ... + 82937199.

It is an arithmetic number, because the mean of its divisors is an integer number (139646080).

Almost surely, 2^18494970624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18494970624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30163553280).

18494970624 is an abundant number, since it is smaller than the sum of its proper divisors (41832135936).

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

18494970624 is a wasteful number, since it uses less digits than its factorization.

18494970624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 18494970624 in words is "eighteen billion, four hundred ninety-four million, nine hundred seventy thousand, six hundred twenty-four".