23116820 has 12 divisors (see below), whose sum is σ = 48545364. Its totient is φ = 9246720.

The previous prime is 23116801. The next prime is 23116831. The reversal of 23116820 is 2861132.

It can be written as a sum of positive squares in 2 ways, for example, as 4072324 + 19044496 = 2018^2 + 4364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577901 + ... + 577940.

It is an arithmetic number, because the mean of its divisors is an integer number (4045447).

Almost surely, 2^23116820 is an apocalyptic number.

23116820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23116820 is an abundant number, since it is smaller than the sum of its proper divisors (25428544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23116820 is a wasteful number, since it uses less digits than its factorization.

23116820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155850 (or 1155848 counting only the distinct ones).

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

The square root of 23116820 is about 4807.9954242907. The cubic root of 23116820 is about 284.8673641570.

Adding to 23116820 its reverse (2861132), we get a palindrome (25977952).

The spelling of 23116820 in words is "twenty-three million, one hundred sixteen thousand, eight hundred twenty".