20623610 has 24 divisors (see below), whose sum is σ = 43184340. Its totient is φ = 7070784.

The previous prime is 20623609. The next prime is 20623619. The reversal of 20623610 is 1632602.

It can be written as a sum of positive squares in 2 ways, for example, as 19018321 + 1605289 = 4361^2 + 1267^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20623619) 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, 20555 + ... + 21534.

Almost surely, 2^20623610 is an apocalyptic number.

20623610 is an abundant number, since it is smaller than the sum of its proper divisors (22560730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20623610 is a wasteful number, since it uses less digits than its factorization.

20623610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42110 (or 42103 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20623610 is about 4541.3224946044. The cubic root of 20623610 is about 274.2341667712.

The spelling of 20623610 in words is "twenty million, six hundred twenty-three thousand, six hundred ten".