18796993 has 2 divisors, whose sum is σ = 18796994. Its totient is φ = 18796992.

The previous prime is 18796979. The next prime is 18797021. The reversal of 18796993 is 39969781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 6066369 = 3568^2 + 2463^2 .

It is an emirp because it is prime and its reverse (39969781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18796993 - 2⁵ = 18796961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18796993.

It is not a weakly prime, because it can be changed into another prime (18796903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9398496 + 9398497.

It is an arithmetic number, because the mean of its divisors is an integer number (9398497).

Almost surely, 2^18796993 is an apocalyptic number.

It is an amenable number.

18796993 is a deficient number, since it is larger than the sum of its proper divisors (1).

18796993 is an equidigital number, since it uses as much as digits as its factorization.

18796993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 18796993 is about 4335.5499074512. The cubic root of 18796993 is about 265.8864016413.

The spelling of 18796993 in words is "eighteen million, seven hundred ninety-six thousand, nine hundred ninety-three".