18733372417 has 8 divisors (see below), whose sum is σ = 18870489000. Its totient is φ = 18596680704.

The previous prime is 18733372409. The next prime is 18733372451. The reversal of 18733372417 is 71427333781.

It can be written as a sum of positive squares in 4 ways, for example, as 14333836176 + 4399536241 = 119724^2 + 66329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18733372417 - 2³ = 18733372409 is a prime.

It is a super-2 number, since 2×18733372417² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18733372457) 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, 17442 + ... + 194347.

It is an arithmetic number, because the mean of its divisors is an integer number (2358811125).

Almost surely, 2^18733372417 is an apocalyptic number.

It is an amenable number.

18733372417 is a deficient number, since it is larger than the sum of its proper divisors (137116583).

18733372417 is a wasteful number, since it uses less digits than its factorization.

18733372417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212435.

The product of its digits is 592704, while the sum is 46.

The spelling of 18733372417 in words is "eighteen billion, seven hundred thirty-three million, three hundred seventy-two thousand, four hundred seventeen".