18139321970999 has 2 divisors, whose sum is σ = 18139321971000. Its totient is φ = 18139321970998.

The previous prime is 18139321970983. The next prime is 18139321971073. The reversal of 18139321970999 is 99907912393181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18139321970999 - 2⁴ = 18139321970983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18139321910999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9069660985499 + 9069660985500.

It is an arithmetic number, because the mean of its divisors is an integer number (9069660985500).

Almost surely, 2^{18139321970999} is an apocalyptic number.

18139321970999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18139321970999 is an equidigital number, since it uses as much as digits as its factorization.

18139321970999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59521392, while the sum is 71.

The spelling of 18139321970999 in words is "eighteen trillion, one hundred thirty-nine billion, three hundred twenty-one million, nine hundred seventy thousand, nine hundred ninety-nine".