18649023828431 has 2 divisors, whose sum is σ = 18649023828432. Its totient is φ = 18649023828430.

The previous prime is 18649023828427. The next prime is 18649023828629. The reversal of 18649023828431 is 13482832094681.

It is a weak prime.

It is an emirp because it is prime and its reverse (13482832094681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18649023828431 - 2² = 18649023828427 is a prime.

It is a super-2 number, since 2×18649023828431² (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 (18649023828031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9324511914215 + 9324511914216.

It is an arithmetic number, because the mean of its divisors is an integer number (9324511914216).

Almost surely, 2^{18649023828431} is an apocalyptic number.

18649023828431 is a deficient number, since it is larger than the sum of its proper divisors (1).

18649023828431 is an equidigital number, since it uses as much as digits as its factorization.

18649023828431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15925248, while the sum is 59.

The spelling of 18649023828431 in words is "eighteen trillion, six hundred forty-nine billion, twenty-three million, eight hundred twenty-eight thousand, four hundred thirty-one".