23463198721 has 4 divisors (see below), whose sum is σ = 23463519444. Its totient is φ = 23462878000.

The previous prime is 23463198719. The next prime is 23463198757. The reversal of 23463198721 is 12789136432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12429797121 + 11033401600 = 111489^2 + 105040^2 .

It is a cyclic number.

It is not a de Polignac number, because 23463198721 - 2¹ = 23463198719 is a prime.

It is a super-2 number, since 2×23463198721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23463198791) 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, 8991 + ... + 216811.

It is an arithmetic number, because the mean of its divisors is an integer number (5865879861).

It is a Proth number, since it is equal to 89505 ⋅ 2¹⁸ + 1 and 89505 < 2¹⁸.

Almost surely, 2^23463198721 is an apocalyptic number.

It is an amenable number.

23463198721 is a deficient number, since it is larger than the sum of its proper divisors (320723).

23463198721 is a wasteful number, since it uses less digits than its factorization.

23463198721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320722.

The product of its digits is 435456, while the sum is 46.

The spelling of 23463198721 in words is "twenty-three billion, four hundred sixty-three million, one hundred ninety-eight thousand, seven hundred twenty-one".