18875212640 has 96 divisors (see below), whose sum is σ = 46086376896. Its totient is φ = 7300464640.

The previous prime is 18875212589. The next prime is 18875212651. The reversal of 18875212640 is 4621257881.

It is a junction number, because it is equal to n+sod(n) for n = 18875212591 and 18875212600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728549 + ... + 754011.

It is an arithmetic number, because the mean of its divisors is an integer number (480066426).

Almost surely, 2^18875212640 is an apocalyptic number.

18875212640 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 18875212640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23043188448).

18875212640 is an abundant number, since it is smaller than the sum of its proper divisors (27211164256).

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

18875212640 is a wasteful number, since it uses less digits than its factorization.

18875212640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25632 (or 25624 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 18875212640 in words is "eighteen billion, eight hundred seventy-five million, two hundred twelve thousand, six hundred forty".