22736642993 has 2 divisors, whose sum is σ = 22736642994. Its totient is φ = 22736642992.

The previous prime is 22736642989. The next prime is 22736643019. The reversal of 22736642993 is 39924663722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22210537024 + 526105969 = 149032^2 + 22937^2 .

It is a cyclic number.

It is not a de Polignac number, because 22736642993 - 2² = 22736642989 is a prime.

It is a super-2 number, since 2×22736642993² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22736642933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11368321496 + 11368321497.

It is an arithmetic number, because the mean of its divisors is an integer number (11368321497).

Almost surely, 2^22736642993 is an apocalyptic number.

It is an amenable number.

22736642993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22736642993 is an equidigital number, since it uses as much as digits as its factorization.

22736642993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 53.

The spelling of 22736642993 in words is "twenty-two billion, seven hundred thirty-six million, six hundred forty-two thousand, nine hundred ninety-three".