20620623 has 16 divisors (see below), whose sum is σ = 28114272. Its totient is φ = 13440000.

The previous prime is 20620619. The next prime is 20620637. The reversal of 20620623 is 32602602.

It is not a de Polignac number, because 20620623 - 2² = 20620619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20620623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51223 + ... + 51623.

It is an arithmetic number, because the mean of its divisors is an integer number (1757142).

Almost surely, 2^20620623 is an apocalyptic number.

20620623 is a deficient number, since it is larger than the sum of its proper divisors (7493649).

20620623 is a wasteful number, since it uses less digits than its factorization.

20620623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20620623 is about 4540.9936137370. The cubic root of 20620623 is about 274.2209266546.

The spelling of 20620623 in words is "twenty million, six hundred twenty thousand, six hundred twenty-three".