11720657323 has 4 divisors (see below), whose sum is σ = 11720962120. Its totient is φ = 11720352528.

The previous prime is 11720657309. The next prime is 11720657411. The reversal of 11720657323 is 32375602711.

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

It is a cyclic number.

It is not a de Polignac number, because 11720657323 - 2⁹ = 11720656811 is a prime.

It is a super-3 number, since 3×11720657323³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11720607323) 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, 84690 + ... + 174967.

It is an arithmetic number, because the mean of its divisors is an integer number (2930240530).

Almost surely, 2^11720657323 is an apocalyptic number.

11720657323 is a deficient number, since it is larger than the sum of its proper divisors (304797).

11720657323 is an equidigital number, since it uses as much as digits as its factorization.

11720657323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304796.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 11720657323 in words is "eleven billion, seven hundred twenty million, six hundred fifty-seven thousand, three hundred twenty-three".