18574988036640 has 384 divisors, whose sum is σ = 68063941951488. Its totient is φ = 4170565324800.

The previous prime is 18574988036603. The next prime is 18574988036653. The reversal of 18574988036640 is 4663088947581.

It is a Cunningham number, because it is equal to 4309871²-1.

It is a super-2 number, since 2×18574988036640² (a number of 27 digits) contains 22 as substring.

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, 42883227 + ... + 43314213.

It is an arithmetic number, because the mean of its divisors is an integer number (177249848832).

Almost surely, 2^{18574988036640} is an apocalyptic number.

18574988036640 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 18574988036640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34031970975744).

18574988036640 is an abundant number, since it is smaller than the sum of its proper divisors (49488953914848).

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

18574988036640 is a wasteful number, since it uses less digits than its factorization.

18574988036640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431240 (or 431232 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 69.

The spelling of 18574988036640 in words is "eighteen trillion, five hundred seventy-four billion, nine hundred eighty-eight million, thirty-six thousand, six hundred forty".