23239409477 has 4 divisors (see below), whose sum is σ = 23478991116. Its totient is φ = 22999827840.

The previous prime is 23239409471. The next prime is 23239409509. The reversal of 23239409477 is 77490493232.

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 12971843236 + 10267566241 = 113894^2 + 101329^2 .

It is a cyclic number.

It is not a de Polignac number, because 23239409477 - 2²² = 23235215173 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 (23239409471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119790674 + ... + 119790867.

It is an arithmetic number, because the mean of its divisors is an integer number (5869747779).

Almost surely, 2^23239409477 is an apocalyptic number.

It is an amenable number.

23239409477 is a deficient number, since it is larger than the sum of its proper divisors (239581639).

23239409477 is an equidigital number, since it uses as much as digits as its factorization.

23239409477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239581638.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The spelling of 23239409477 in words is "twenty-three billion, two hundred thirty-nine million, four hundred nine thousand, four hundred seventy-seven".