18226252461720 has 64 divisors (see below), whose sum is σ = 54680053972320. Its totient is φ = 4860218737664.

The previous prime is 18226252461719. The next prime is 18226252461779. The reversal of 18226252461720 is 2716425262281.

It is a self number, because there is not a number n which added to its sum of digits gives 18226252461720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3341764 + ... + 6900716.

Almost surely, 2^{18226252461720} is an apocalyptic number.

18226252461720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18226252461720 is an abundant number, since it is smaller than the sum of its proper divisors (36453801510600).

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

18226252461720 is a wasteful number, since it uses less digits than its factorization.

18226252461720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601644 (or 3601640 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 18226252461720 in words is "eighteen trillion, two hundred twenty-six billion, two hundred fifty-two million, four hundred sixty-one thousand, seven hundred twenty".