23013538477 has 4 divisors (see below), whose sum is σ = 23044935580. Its totient is φ = 22982141376.

The previous prime is 23013538459. The next prime is 23013538487. The reversal of 23013538477 is 77483531032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19569491881 + 3444046596 = 139891^2 + 58686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23013538477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23013538487) 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, 15697452 + ... + 15698917.

It is an arithmetic number, because the mean of its divisors is an integer number (5761233895).

Almost surely, 2^23013538477 is an apocalyptic number.

It is an amenable number.

23013538477 is a deficient number, since it is larger than the sum of its proper divisors (31397103).

23013538477 is an equidigital number, since it uses as much as digits as its factorization.

23013538477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31397102.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 23013538477 in words is "twenty-three billion, thirteen million, five hundred thirty-eight thousand, four hundred seventy-seven".