23017890061 has 4 divisors (see below), whose sum is σ = 24371883612. Its totient is φ = 21663896512.

The previous prime is 23017890037. The next prime is 23017890097. The reversal of 23017890061 is 16009871032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6481216036 + 16536674025 = 80506^2 + 128595^2 .

It is a cyclic number.

It is not a de Polignac number, because 23017890061 - 2⁵ = 23017890029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23017890061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23017890031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676996750 + ... + 676996783.

It is an arithmetic number, because the mean of its divisors is an integer number (6092970903).

Almost surely, 2^23017890061 is an apocalyptic number.

It is an amenable number.

23017890061 is a deficient number, since it is larger than the sum of its proper divisors (1353993551).

23017890061 is a wasteful number, since it uses less digits than its factorization.

23017890061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353993550.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 23017890061 in words is "twenty-three billion, seventeen million, eight hundred ninety thousand, sixty-one".