23868421 has 12 divisors (see below), whose sum is σ = 25053444. Its totient is φ = 22736000.

The previous prime is 23868401. The next prime is 23868443. The reversal of 23868421 is 12486832.

It can be written as a sum of positive squares in 6 ways, for example, as 3744225 + 20124196 = 1935^2 + 4486^2 .

It is not a de Polignac number, because 23868421 - 2¹⁷ = 23737349 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 (23868401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84801 + ... + 85081.

It is an arithmetic number, because the mean of its divisors is an integer number (2087787).

Almost surely, 2^23868421 is an apocalyptic number.

It is an amenable number.

23868421 is a deficient number, since it is larger than the sum of its proper divisors (1185023).

23868421 is a wasteful number, since it uses less digits than its factorization.

23868421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 411 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 23868421 is about 4885.5318031920. The cubic root of 23868421 is about 287.9218095671.

The spelling of 23868421 in words is "twenty-three million, eight hundred sixty-eight thousand, four hundred twenty-one".