20624623 has 2 divisors, whose sum is σ = 20624624. Its totient is φ = 20624622.

The previous prime is 20624603. The next prime is 20624657. The reversal of 20624623 is 32642602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20624623 - 2²¹ = 18527471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20624603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312311 + 10312312.

It is an arithmetic number, because the mean of its divisors is an integer number (10312312).

Almost surely, 2^20624623 is an apocalyptic number.

20624623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20624623 is an equidigital number, since it uses as much as digits as its factorization.

20624623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20624623 is about 4541.4340246226. The cubic root of 20624623 is about 274.2386566845.

The spelling of 20624623 in words is "twenty million, six hundred twenty-four thousand, six hundred twenty-three".