18642914640 has 200 divisors, whose sum is σ = 73999728000. Its totient is φ = 4261227264.

The previous prime is 18642914617. The next prime is 18642914651. The reversal of 18642914640 is 4641924681.

18642914640 is a `hidden beast` number, since 1 + 86 + 429 + 146 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 160140 + ... + 250859.

It is an arithmetic number, because the mean of its divisors is an integer number (369998640).

Almost surely, 2^18642914640 is an apocalyptic number.

18642914640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18642914640 is an abundant number, since it is smaller than the sum of its proper divisors (55356813360).

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

18642914640 is a wasteful number, since it uses less digits than its factorization.

18642914640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411031 (or 411016 counting only the distinct ones).

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

The spelling of 18642914640 in words is "eighteen billion, six hundred forty-two million, nine hundred fourteen thousand, six hundred forty".