23420637 has 8 divisors (see below), whose sum is σ = 34697280. Its totient is φ = 15613740.

The previous prime is 23420629. The next prime is 23420641. The reversal of 23420637 is 73602432.

23420637 is a `hidden beast` number, since 2 + 3 + 4 + 20 + 637 = 666.

It is not a de Polignac number, because 23420637 - 2³ = 23420629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 867431 = 23420637 / (2 + 3 + 4 + 2 + 0 + 6 + 3 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 23420637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433689 + ... + 433742.

It is an arithmetic number, because the mean of its divisors is an integer number (4337160).

Almost surely, 2^23420637 is an apocalyptic number.

23420637 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

23420637 is a deficient number, since it is larger than the sum of its proper divisors (11276643).

23420637 is an equidigital number, since it uses as much as digits as its factorization.

23420637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867440 (or 867434 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 23420637 is about 4839.4872662298. The cubic root of 23420637 is about 286.1099101579.

The spelling of 23420637 in words is "twenty-three million, four hundred twenty thousand, six hundred thirty-seven".