18437979000 has 256 divisors, whose sum is σ = 69613240320. Its totient is φ = 3966412800.

The previous prime is 18437978969. The next prime is 18437979019. The reversal of 18437979000 is 97973481.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 331177 + ... + 382823.

It is an arithmetic number, because the mean of its divisors is an integer number (271926720).

Almost surely, 2^18437979000 is an apocalyptic number.

18437979000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18437979000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34806620160).

18437979000 is an abundant number, since it is smaller than the sum of its proper divisors (51175261320).

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

18437979000 is a wasteful number, since it uses less digits than its factorization.

18437979000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51695 (or 51681 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 18437979000 in words is "eighteen billion, four hundred thirty-seven million, nine hundred seventy-nine thousand".