20769730 has 8 divisors (see below), whose sum is σ = 37385532. Its totient is φ = 8307888.

The previous prime is 20769709. The next prime is 20769743. The reversal of 20769730 is 3796702.

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 3481 = 4557^2 + 59^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038477 + ... + 1038496.

Almost surely, 2^20769730 is an apocalyptic number.

20769730 is a deficient number, since it is larger than the sum of its proper divisors (16615802).

20769730 is a wasteful number, since it uses less digits than its factorization.

20769730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076980.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 20769730 is about 4557.3819238681. The cubic root of 20769730 is about 274.8803005229.

The spelling of 20769730 in words is "twenty million, seven hundred sixty-nine thousand, seven hundred thirty".