23698879421 has 4 divisors (see below), whose sum is σ = 27084433632. Its totient is φ = 20313325212.

The previous prime is 23698879397. The next prime is 23698879441. The reversal of 23698879421 is 12497889632.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23698879421 - 2¹⁴ = 23698863037 is a prime.

It is a super-2 number, since 2×23698879421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23698879441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692777095 + ... + 1692777108.

It is an arithmetic number, because the mean of its divisors is an integer number (6771108408).

Almost surely, 2^23698879421 is an apocalyptic number.

It is an amenable number.

23698879421 is a deficient number, since it is larger than the sum of its proper divisors (3385554211).

23698879421 is an equidigital number, since it uses as much as digits as its factorization.

23698879421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385554210.

The product of its digits is 10450944, while the sum is 59.

The spelling of 23698879421 in words is "twenty-three billion, six hundred ninety-eight million, eight hundred seventy-nine thousand, four hundred twenty-one".