18701013077 has 2 divisors, whose sum is σ = 18701013078. Its totient is φ = 18701013076.

The previous prime is 18701013049. The next prime is 18701013151. The reversal of 18701013077 is 77031010781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18689897521 + 11115556 = 136711^2 + 3334^2 .

It is a cyclic number.

It is not a de Polignac number, because 18701013077 - 2¹⁶ = 18700947541 is a prime.

It is a super-2 number, since 2×18701013077² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18701013977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350506538 + 9350506539.

It is an arithmetic number, because the mean of its divisors is an integer number (9350506539).

Almost surely, 2^18701013077 is an apocalyptic number.

It is an amenable number.

18701013077 is a deficient number, since it is larger than the sum of its proper divisors (1).

18701013077 is an equidigital number, since it uses as much as digits as its factorization.

18701013077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8232, while the sum is 35.

The spelling of 18701013077 in words is "eighteen billion, seven hundred one million, thirteen thousand, seventy-seven".