18406336996 has 6 divisors (see below), whose sum is σ = 32211089750. Its totient is φ = 9203168496.

The previous prime is 18406336961. The next prime is 18406336997. The reversal of 18406336996 is 69963360481.

It can be written as a sum of positive squares in only one way, i.e., 16261350400 + 2144986596 = 127520^2 + 46314^2 .

It is a super-2 number, since 2×18406336996² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18406336997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2300792121 + ... + 2300792128.

Almost surely, 2^18406336996 is an apocalyptic number.

It is an amenable number.

18406336996 is a deficient number, since it is larger than the sum of its proper divisors (13804752754).

18406336996 is a wasteful number, since it uses less digits than its factorization.

18406336996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601584253 (or 4601584251 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 18406336996 in words is "eighteen billion, four hundred six million, three hundred thirty-six thousand, nine hundred ninety-six".