18902534238380 has 576 divisors, whose sum is σ = 46846323965952. Its totient is φ = 6389537955840.

The previous prime is 18902534238377. The next prime is 18902534238383. The reversal of 18902534238380 is 8383243520981.

It is an interprime number because it is at equal distance from previous prime (18902534238377) and next prime (18902534238383).

It is not an unprimeable number, because it can be changed into a prime (18902534238383) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 41362219112 + ... + 41362219568.

It is an arithmetic number, because the mean of its divisors is an integer number (81330423552).

Almost surely, 2^{18902534238380} is an apocalyptic number.

18902534238380 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 18902534238380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23423161982976).

18902534238380 is an abundant number, since it is smaller than the sum of its proper divisors (27943789727572).

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

18902534238380 is a wasteful number, since it uses less digits than its factorization.

18902534238380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 18902534238380 in words is "eighteen trillion, nine hundred two billion, five hundred thirty-four million, two hundred thirty-eight thousand, three hundred eighty".