20650620 has 24 divisors (see below), whose sum is σ = 57821904. Its totient is φ = 5506816.

The previous prime is 20650607. The next prime is 20650657. The reversal of 20650620 is 2605602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172029 + ... + 172148.

It is an arithmetic number, because the mean of its divisors is an integer number (2409246).

Almost surely, 2^20650620 is an apocalyptic number.

20650620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20650620 is an abundant number, since it is smaller than the sum of its proper divisors (37171284).

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

20650620 is a wasteful number, since it uses less digits than its factorization.

20650620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344189 (or 344187 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20650620 is about 4544.2953249101. The cubic root of 20650620 is about 274.3538327529.

The spelling of 20650620 in words is "twenty million, six hundred fifty thousand, six hundred twenty".