20769774 has 48 divisors (see below), whose sum is σ = 45061632. Its totient is φ = 6377616.

The previous prime is 20769757. The next prime is 20769779. The reversal of 20769774 is 47796702.

It is a super-2 number, since 2×20769774² = 862767024022152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20769779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93027 + ... + 93249.

It is an arithmetic number, because the mean of its divisors is an integer number (938784).

Almost surely, 2^20769774 is an apocalyptic number.

20769774 is an abundant number, since it is smaller than the sum of its proper divisors (24291858).

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

20769774 is a wasteful number, since it uses less digits than its factorization.

20769774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 42.

The square root of 20769774 is about 4557.3867511985. The cubic root of 20769774 is about 274.8804946311.

The spelling of 20769774 in words is "twenty million, seven hundred sixty-nine thousand, seven hundred seventy-four".