20930769 has 12 divisors (see below), whose sum is σ = 30427956. Its totient is φ = 13864032.

The previous prime is 20930737. The next prime is 20930801. The reversal of 20930769 is 96703902.

It is an interprime number because it is at equal distance from previous prime (20930737) and next prime (20930801).

It can be written as a sum of positive squares in 2 ways, for example, as 6185169 + 14745600 = 2487^2 + 3840^2 .

It is not a de Polignac number, because 20930769 - 2⁵ = 20930737 is a prime.

It is a super-2 number, since 2×20930769² = 876194181862722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20930269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5994 + ... + 8819.

It is an arithmetic number, because the mean of its divisors is an integer number (2535663).

Almost surely, 2^20930769 is an apocalyptic number.

It is an amenable number.

20930769 is a deficient number, since it is larger than the sum of its proper divisors (9497187).

20930769 is a wasteful number, since it uses less digits than its factorization.

20930769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14976 (or 14973 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 20930769 is about 4575.0157376778. The cubic root of 20930769 is about 275.5889043697.

The spelling of 20930769 in words is "twenty million, nine hundred thirty thousand, seven hundred sixty-nine".