23890457885 has 24 divisors (see below), whose sum is σ = 33914388960. Its totient is φ = 16104357024.

The previous prime is 23890457881. The next prime is 23890457947. The reversal of 23890457885 is 58875409832.

It is not a de Polignac number, because 23890457885 - 2² = 23890457881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23890457881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 811919 + ... + 840828.

It is an arithmetic number, because the mean of its divisors is an integer number (1413099540).

Almost surely, 2^23890457885 is an apocalyptic number.

It is an amenable number.

23890457885 is a deficient number, since it is larger than the sum of its proper divisors (10023931075).

23890457885 is a wasteful number, since it uses less digits than its factorization.

23890457885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652825 (or 1652818 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 59.

The spelling of 23890457885 in words is "twenty-three billion, eight hundred ninety million, four hundred fifty-seven thousand, eight hundred eighty-five".