20650624 has 16 divisors (see below), whose sum is σ = 41140170. Its totient is φ = 10325248.

The previous prime is 20650607. The next prime is 20650657. The reversal of 20650624 is 42605602.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 937024 = 4440^2 + 968^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80539 + ... + 80794.

Almost surely, 2^20650624 is an apocalyptic number.

It is an amenable number.

20650624 is a deficient number, since it is larger than the sum of its proper divisors (20489546).

20650624 is an equidigital number, since it uses as much as digits as its factorization.

20650624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161347 (or 161335 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20650624 is about 4544.2957650223. The cubic root of 20650624 is about 274.3538504669.

The spelling of 20650624 in words is "twenty million, six hundred fifty thousand, six hundred twenty-four".