23381917509405 has 64 divisors (see below), whose sum is σ = 46799217658368. Its totient is φ = 9704906818560.

The previous prime is 23381917509383. The next prime is 23381917509439. The reversal of 23381917509405 is 50490571918332.

It is a happy number.

It is not a de Polignac number, because 23381917509405 - 2⁵ = 23381917509373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140323374 + ... + 140489903.

It is an arithmetic number, because the mean of its divisors is an integer number (731237775912).

Almost surely, 2^{23381917509405} is an apocalyptic number.

It is an amenable number.

23381917509405 is an abundant number, since it is smaller than the sum of its proper divisors (23417300148963).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23381917509405 is a wasteful number, since it uses less digits than its factorization.

23381917509405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280813366.

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 23381917509405 in words is "twenty-three trillion, three hundred eighty-one billion, nine hundred seventeen million, five hundred nine thousand, four hundred five".