23147918149 has 2 divisors, whose sum is σ = 23147918150. Its totient is φ = 23147918148.

The previous prime is 23147918077. The next prime is 23147918219. The reversal of 23147918149 is 94181974132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19914289924 + 3233628225 = 141118^2 + 56865^2 .

It is a cyclic number.

It is not a de Polignac number, because 23147918149 - 2¹⁵ = 23147885381 is a prime.

It is a super-2 number, since 2×23147918149² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23147918249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11573959074 + 11573959075.

It is an arithmetic number, because the mean of its divisors is an integer number (11573959075).

Almost surely, 2^23147918149 is an apocalyptic number.

It is an amenable number.

23147918149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23147918149 is an equidigital number, since it uses as much as digits as its factorization.

23147918149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The spelling of 23147918149 in words is "twenty-three billion, one hundred forty-seven million, nine hundred eighteen thousand, one hundred forty-nine".