23578877421 has 48 divisors (see below), whose sum is σ = 38156122368. Its totient is φ = 13908412800.

The previous prime is 23578877417. The next prime is 23578877429. The reversal of 23578877421 is 12477887532.

23578877421 is a `hidden beast` number, since 23 + 57 + 88 + 77 + 421 = 666.

It is not a de Polignac number, because 23578877421 - 2² = 23578877417 is a prime.

It is a super-2 number, since 2×23578877421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23578877429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 828195 + ... + 856191.

It is an arithmetic number, because the mean of its divisors is an integer number (794919216).

Almost surely, 2^23578877421 is an apocalyptic number.

It is an amenable number.

23578877421 is a deficient number, since it is larger than the sum of its proper divisors (14577244947).

23578877421 is a wasteful number, since it uses less digits than its factorization.

23578877421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28242 (or 28239 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 23578877421 in words is "twenty-three billion, five hundred seventy-eight million, eight hundred seventy-seven thousand, four hundred twenty-one".