23191946397 has 24 divisors (see below), whose sum is σ = 35559473976. Its totient is φ = 14515117056.

The previous prime is 23191946369. The next prime is 23191946417. The reversal of 23191946397 is 79364919132.

It is a happy number.

23191946397 is a `hidden beast` number, since 2 + 3 + 1 + 91 + 9 + 463 + 97 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5004996516 + 18186949881 = 70746^2 + 134859^2 .

It is not a de Polignac number, because 23191946397 - 2²⁸ = 22923510941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23191941397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130168 + ... + 251649.

It is an arithmetic number, because the mean of its divisors is an integer number (1481644749).

Almost surely, 2^23191946397 is an apocalyptic number.

It is an amenable number.

23191946397 is a deficient number, since it is larger than the sum of its proper divisors (12367527579).

23191946397 is a wasteful number, since it uses less digits than its factorization.

23191946397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382237 (or 382234 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The spelling of 23191946397 in words is "twenty-three billion, one hundred ninety-one million, nine hundred forty-six thousand, three hundred ninety-seven".