23105531947 has 2 divisors, whose sum is σ = 23105531948. Its totient is φ = 23105531946.

The previous prime is 23105531927. The next prime is 23105532061. The reversal of 23105531947 is 74913550132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23105531947 - 2⁷ = 23105531819 is a prime.

It is a super-2 number, since 2×23105531947² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23105531927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11552765973 + 11552765974.

It is an arithmetic number, because the mean of its divisors is an integer number (11552765974).

Almost surely, 2^23105531947 is an apocalyptic number.

23105531947 is a deficient number, since it is larger than the sum of its proper divisors (1).

23105531947 is an equidigital number, since it uses as much as digits as its factorization.

23105531947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 23105531947 in words is "twenty-three billion, one hundred five million, five hundred thirty-one thousand, nine hundred forty-seven".