18737467422520 has 256 divisors, whose sum is σ = 52661634969600. Its totient is φ = 5829218304000.

The previous prime is 18737467422511. The next prime is 18737467422547. The reversal of 18737467422520 is 2522476473781.

It is a happy number.

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, 5839034676 + ... + 5839037884.

It is an arithmetic number, because the mean of its divisors is an integer number (205709511600).

Almost surely, 2^{18737467422520} is an apocalyptic number.

18737467422520 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 18737467422520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26330817484800).

18737467422520 is an abundant number, since it is smaller than the sum of its proper divisors (33924167547080).

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

18737467422520 is a wasteful number, since it uses less digits than its factorization.

18737467422520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230 (or 6226 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 58.

The spelling of 18737467422520 in words is "eighteen trillion, seven hundred thirty-seven billion, four hundred sixty-seven million, four hundred twenty-two thousand, five hundred twenty".