23813811 has 32 divisors (see below), whose sum is σ = 40619520. Its totient is φ = 13506912.

The previous prime is 23813807. The next prime is 23813831. The reversal of 23813811 is 11831832.

It is not a de Polignac number, because 23813811 - 2² = 23813807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23813831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30421 + ... + 31193.

It is an arithmetic number, because the mean of its divisors is an integer number (1269360).

Almost surely, 2^23813811 is an apocalyptic number.

23813811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23813811 is a deficient number, since it is larger than the sum of its proper divisors (16805709).

23813811 is a wasteful number, since it uses less digits than its factorization.

23813811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 946 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 23813811 is about 4879.9396512662. The cubic root of 23813811 is about 287.7020573291.

The spelling of 23813811 in words is "twenty-three million, eight hundred thirteen thousand, eight hundred eleven".