18464970893 has 2 divisors, whose sum is σ = 18464970894. Its totient is φ = 18464970892.

The previous prime is 18464970877. The next prime is 18464970959. The reversal of 18464970893 is 39807946481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12362548969 + 6102421924 = 111187^2 + 78118^2 .

It is a cyclic number.

It is not a de Polignac number, because 18464970893 - 2⁴ = 18464970877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18464970593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232485446 + 9232485447.

It is an arithmetic number, because the mean of its divisors is an integer number (9232485447).

Almost surely, 2^18464970893 is an apocalyptic number.

It is an amenable number.

18464970893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18464970893 is an equidigital number, since it uses as much as digits as its factorization.

18464970893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 18464970893 in words is "eighteen billion, four hundred sixty-four million, nine hundred seventy thousand, eight hundred ninety-three".