23128472550 has 24 divisors (see below), whose sum is σ = 57358612296. Its totient is φ = 6167592640.

The previous prime is 23128472537. The next prime is 23128472581. The reversal of 23128472550 is 5527482132.

It is a super-2 number, since 2×23128472550² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23128472499 and 23128472508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77094759 + ... + 77095058.

It is an arithmetic number, because the mean of its divisors is an integer number (2389942179).

Almost surely, 2^23128472550 is an apocalyptic number.

23128472550 is an abundant number, since it is smaller than the sum of its proper divisors (34230139746).

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

23128472550 is a wasteful number, since it uses less digits than its factorization.

23128472550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154189832 (or 154189827 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 23128472550 in words is "twenty-three billion, one hundred twenty-eight million, four hundred seventy-two thousand, five hundred fifty".