23313721457 has 8 divisors (see below), whose sum is σ = 25109721000. Its totient is φ = 21518098560.

The previous prime is 23313721433. The next prime is 23313721489. The reversal of 23313721457 is 75412731332.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5843226481 + 17470494976 = 76441^2 + 132176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23313721457 - 2⁶ = 23313721393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23313721457.

It is not an unprimeable number, because it can be changed into a prime (23313721157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41669 + ... + 219917.

It is an arithmetic number, because the mean of its divisors is an integer number (3138715125).

Almost surely, 2^23313721457 is an apocalyptic number.

It is an amenable number.

23313721457 is a deficient number, since it is larger than the sum of its proper divisors (1795999543).

23313721457 is a wasteful number, since it uses less digits than its factorization.

23313721457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188323.

The product of its digits is 105840, while the sum is 38.

The spelling of 23313721457 in words is "twenty-three billion, three hundred thirteen million, seven hundred twenty-one thousand, four hundred fifty-seven".