23698920649 has 2 divisors, whose sum is σ = 23698920650. Its totient is φ = 23698920648.

The previous prime is 23698920607. The next prime is 23698920667. The reversal of 23698920649 is 94602989632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18212852025 + 5486068624 = 134955^2 + 74068^2 .

It is a cyclic number.

It is not a de Polignac number, because 23698920649 - 2⁹ = 23698920137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23698920593 and 23698920602.

It is not a weakly prime, because it can be changed into another prime (23698920449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11849460324 + 11849460325.

It is an arithmetic number, because the mean of its divisors is an integer number (11849460325).

Almost surely, 2^23698920649 is an apocalyptic number.

It is an amenable number.

23698920649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23698920649 is an equidigital number, since it uses as much as digits as its factorization.

23698920649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 23698920649 in words is "twenty-three billion, six hundred ninety-eight million, nine hundred twenty thousand, six hundred forty-nine".