18396212736 has 120 divisors (see below), whose sum is σ = 53869567752. Its totient is φ = 5574553600.

The previous prime is 18396212717. The next prime is 18396212741. The reversal of 18396212736 is 63721269381.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136366 + ... + 235346.

Almost surely, 2^18396212736 is an apocalyptic number.

18396212736 is a gapful number since it is divisible by the number (16) 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 18396212736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26934783876).

18396212736 is an abundant number, since it is smaller than the sum of its proper divisors (35473355016).

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

18396212736 is an equidigital number, since it uses as much as digits as its factorization.

18396212736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99024 (or 98997 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

It can be divided in two parts, 18396 and 212736, that added together give a palindrome (231132).

The spelling of 18396212736 in words is "eighteen billion, three hundred ninety-six million, two hundred twelve thousand, seven hundred thirty-six".