20799620 has 24 divisors (see below), whose sum is σ = 43846488. Its totient is φ = 8288000.

The previous prime is 20799607. The next prime is 20799631. The reversal of 20799620 is 2699702.

It can be written as a sum of positive squares in 4 ways, for example, as 2617924 + 18181696 = 1618^2 + 4264^2 .

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, 3770 + ... + 7470.

It is an arithmetic number, because the mean of its divisors is an integer number (1826937).

Almost surely, 2^20799620 is an apocalyptic number.

20799620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20799620 is an abundant number, since it is smaller than the sum of its proper divisors (23046868).

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

20799620 is a wasteful number, since it uses less digits than its factorization.

20799620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991 (or 3989 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20799620 is about 4560.6600399504. The cubic root of 20799620 is about 275.0120986413.

The spelling of 20799620 in words is "twenty million, seven hundred ninety-nine thousand, six hundred twenty".