11820623 has 4 divisors (see below), whose sum is σ = 11886840. Its totient is φ = 11754408.

The previous prime is 11820607. The next prime is 11820647. The reversal of 11820623 is 32602811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32602811 = 373 ⋅87407.

It is a cyclic number.

It is not a de Polignac number, because 11820623 - 2⁴ = 11820607 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 (11820673) 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, 32840 + ... + 33197.

It is an arithmetic number, because the mean of its divisors is an integer number (2971710).

Almost surely, 2^11820623 is an apocalyptic number.

11820623 is a deficient number, since it is larger than the sum of its proper divisors (66217).

11820623 is an equidigital number, since it uses as much as digits as its factorization.

11820623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66216.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 11820623 is about 3438.1132907454. The cubic root of 11820623 is about 227.7963645528.

The spelling of 11820623 in words is "eleven million, eight hundred twenty thousand, six hundred twenty-three".