23201878949 has 2 divisors, whose sum is σ = 23201878950. Its totient is φ = 23201878948.

The previous prime is 23201878943. The next prime is 23201878951. The reversal of 23201878949 is 94987810232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16519960900 + 6681918049 = 128530^2 + 81743^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201878949 - 2¹² = 23201874853 is a prime.

Together with 23201878951, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23201878949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23201878943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600939474 + 11600939475.

It is an arithmetic number, because the mean of its divisors is an integer number (11600939475).

Almost surely, 2^23201878949 is an apocalyptic number.

It is an amenable number.

23201878949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201878949 is an equidigital number, since it uses as much as digits as its factorization.

23201878949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 23201878949 in words is "twenty-three billion, two hundred one million, eight hundred seventy-eight thousand, nine hundred forty-nine".