18836737920 has 1536 divisors, whose sum is σ = 91317058560. Its totient is φ = 3613040640.

The previous prime is 18836737891. The next prime is 18836737951. The reversal of 18836737920 is 2973763881.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 4290 × 4158 × 1056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1448979834 + ... + 1448979846.

It is an arithmetic number, because the mean of its divisors is an integer number (59451210).

Almost surely, 2^18836737920 is an apocalyptic number.

18836737920 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 18836737920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45658529280).

18836737920 is an abundant number, since it is smaller than the sum of its proper divisors (72480320640).

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

18836737920 is an equidigital number, since it uses as much as digits as its factorization.

18836737920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 18836737920 in words is "eighteen billion, eight hundred thirty-six million, seven hundred thirty-seven thousand, nine hundred twenty".