11720023 has 4 divisors (see below), whose sum is σ = 13394320. Its totient is φ = 10045728.

The previous prime is 11719999. The next prime is 11720029. The reversal of 11720023 is 32002711.

It is a happy number.

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

It is not a de Polignac number, because 11720023 - 2²¹ = 9622871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11719979 and 11720006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720029) 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, 837138 + ... + 837151.

It is an arithmetic number, because the mean of its divisors is an integer number (3348580).

Almost surely, 2^11720023 is an apocalyptic number.

11720023 is a deficient number, since it is larger than the sum of its proper divisors (1674297).

11720023 is an equidigital number, since it uses as much as digits as its factorization.

11720023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674296.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 11720023 is about 3423.4519129090. The cubic root of 11720023 is about 227.1482984978.

Adding to 11720023 its reverse (32002711), we get a palindrome (43722734).

The spelling of 11720023 in words is "eleven million, seven hundred twenty thousand, twenty-three".