20769650 has 36 divisors (see below), whose sum is σ = 42475146. Its totient is φ = 7550400.

The previous prime is 20769649. The next prime is 20769689. The reversal of 20769650 is 5696702.

It can be written as a sum of positive squares in 3 ways, for example, as 13741849 + 7027801 = 3707^2 + 2651^2 .

It is a super-2 number, since 2×20769650² = 862756722245000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20769650.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4334 + ... + 7766.

Almost surely, 2^20769650 is an apocalyptic number.

20769650 is an abundant number, since it is smaller than the sum of its proper divisors (21705496).

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

20769650 is a wasteful number, since it uses less digits than its factorization.

20769650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467 (or 3451 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 20769650 is about 4557.3731468907. The cubic root of 20769650 is about 274.8799475982.

The spelling of 20769650 in words is "twenty million, seven hundred sixty-nine thousand, six hundred fifty".