23636389949 has 2 divisors, whose sum is σ = 23636389950. Its totient is φ = 23636389948.

The previous prime is 23636389927. The next prime is 23636389981. The reversal of 23636389949 is 94998363632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20711527225 + 2924862724 = 143915^2 + 54082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23636389949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23636389891 and 23636389900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23636389919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11818194974 + 11818194975.

It is an arithmetic number, because the mean of its divisors is an integer number (11818194975).

Almost surely, 2^23636389949 is an apocalyptic number.

It is an amenable number.

23636389949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23636389949 is an equidigital number, since it uses as much as digits as its factorization.

23636389949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45349632, while the sum is 62.

The spelling of 23636389949 in words is "twenty-three billion, six hundred thirty-six million, three hundred eighty-nine thousand, nine hundred forty-nine".