18236420218992 has 40 divisors (see below), whose sum is σ = 47347489705600. Its totient is φ = 6048259968960.

The previous prime is 18236420218979. The next prime is 18236420218997. The reversal of 18236420218992 is 29981202463281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18236420218997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954576934 + ... + 954596037.

It is an arithmetic number, because the mean of its divisors is an integer number (1183687242640).

Almost surely, 2^{18236420218992} is an apocalyptic number.

18236420218992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18236420218992 is an abundant number, since it is smaller than the sum of its proper divisors (29111069486608).

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

18236420218992 is a wasteful number, since it uses less digits than its factorization.

18236420218992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909173181 (or 1909173175 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 18236420218992 in words is "eighteen trillion, two hundred thirty-six billion, four hundred twenty million, two hundred eighteen thousand, nine hundred ninety-two".