18412651720 has 32 divisors (see below), whose sum is σ = 43865436600. Its totient is φ = 6931821568.

The previous prime is 18412651711. The next prime is 18412651721. The reversal of 18412651720 is 2715621481.

It can be written as a sum of positive squares in 4 ways, for example, as 12375672516 + 6036979204 = 111246^2 + 77698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18412651720.

It is not an unprimeable number, because it can be changed into a prime (18412651721) 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, 13538035 + ... + 13539394.

Almost surely, 2^18412651720 is an apocalyptic number.

18412651720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18412651720 is an abundant number, since it is smaller than the sum of its proper divisors (25452784880).

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

18412651720 is a wasteful number, since it uses less digits than its factorization.

18412651720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27077457 (or 27077453 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 18412651720 in words is "eighteen billion, four hundred twelve million, six hundred fifty-one thousand, seven hundred twenty".