23540978989 has 8 divisors (see below), whose sum is σ = 26509489920. Its totient is φ = 20710538400.

The previous prime is 23540978983. The next prime is 23540979001. The reversal of 23540978989 is 98987904532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23540978989 - 2⁵ = 23540978957 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 23540978989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23540978983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34517224 + ... + 34517905.

It is an arithmetic number, because the mean of its divisors is an integer number (3313686240).

Almost surely, 2^23540978989 is an apocalyptic number.

It is an amenable number.

23540978989 is a deficient number, since it is larger than the sum of its proper divisors (2968510931).

23540978989 is a wasteful number, since it uses less digits than its factorization.

23540978989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69035171.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 23540978989 in words is "twenty-three billion, five hundred forty million, nine hundred seventy-eight thousand, nine hundred eighty-nine".