18993506097607 has 2 divisors, whose sum is σ = 18993506097608. Its totient is φ = 18993506097606.

The previous prime is 18993506097593. The next prime is 18993506097623. The reversal of 18993506097607 is 70679060539981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18993506097607 - 2¹⁵ = 18993506064839 is a prime.

It is a super-2 number, since 2×18993506097607² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18993506097647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9496753048803 + 9496753048804.

It is an arithmetic number, because the mean of its divisors is an integer number (9496753048804).

Almost surely, 2^{18993506097607} is an apocalyptic number.

18993506097607 is a deficient number, since it is larger than the sum of its proper divisors (1).

18993506097607 is an equidigital number, since it uses as much as digits as its factorization.

18993506097607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154314720, while the sum is 70.

The spelling of 18993506097607 in words is "eighteen trillion, nine hundred ninety-three billion, five hundred six million, ninety-seven thousand, six hundred seven".