18406156337 has 8 divisors (see below), whose sum is σ = 18514267200. Its totient is φ = 18298339984.

The previous prime is 18406156319. The next prime is 18406156339. The reversal of 18406156337 is 73365160481.

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 18406156337 - 2¹² = 18406152241 is a prime.

It is a super-2 number, since 2×18406156337² (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 (18406156339) 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, 52364 + ... + 198882.

It is an arithmetic number, because the mean of its divisors is an integer number (2314283400).

Almost surely, 2^18406156337 is an apocalyptic number.

It is an amenable number.

18406156337 is a deficient number, since it is larger than the sum of its proper divisors (108110863).

18406156337 is a wasteful number, since it uses less digits than its factorization.

18406156337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147255.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 18406156337 in words is "eighteen billion, four hundred six million, one hundred fifty-six thousand, three hundred thirty-seven".