23870421 has 6 divisors (see below), whose sum is σ = 34479510. Its totient is φ = 15913608.

The previous prime is 23870411. The next prime is 23870443. The reversal of 23870421 is 12407832.

23870421 is a `hidden beast` number, since 238 + 7 + 0 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 11655396 = 3495^2 + 3414^2 .

It is not a de Polignac number, because 23870421 - 2¹⁹ = 23346133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23870411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1326126 + ... + 1326143.

It is an arithmetic number, because the mean of its divisors is an integer number (5746585).

Almost surely, 2^23870421 is an apocalyptic number.

It is an amenable number.

23870421 is a deficient number, since it is larger than the sum of its proper divisors (10609089).

23870421 is a wasteful number, since it uses less digits than its factorization.

23870421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652275 (or 2652272 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23870421 is about 4885.7364849120. The cubic root of 23870421 is about 287.9298512600.

The spelling of 23870421 in words is "twenty-three million, eight hundred seventy thousand, four hundred twenty-one".