18721472751352 has 64 divisors (see below), whose sum is σ = 40135014720000. Its totient is φ = 8019974712960.

The previous prime is 18721472751347. The next prime is 18721472751409. The reversal of 18721472751352 is 25315727412781.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18721472751293 and 18721472751302.

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, 2186317423 + ... + 2186325985.

It is an arithmetic number, because the mean of its divisors is an integer number (627109605000).

Almost surely, 2^{18721472751352} is an apocalyptic number.

It is an amenable number.

18721472751352 is an abundant number, since it is smaller than the sum of its proper divisors (21413541968648).

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

18721472751352 is a wasteful number, since it uses less digits than its factorization.

18721472751352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21116 (or 21112 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 55.

The spelling of 18721472751352 in words is "eighteen trillion, seven hundred twenty-one billion, four hundred seventy-two million, seven hundred fifty-one thousand, three hundred fifty-two".