20769258 has 32 divisors (see below), whose sum is σ = 43084800. Its totient is φ = 6669936.

The previous prime is 20769251. The next prime is 20769271. The reversal of 20769258 is 85296702.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20769251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19873 + ... + 20891.

It is an arithmetic number, because the mean of its divisors is an integer number (1346400).

Almost surely, 2^20769258 is an apocalyptic number.

20769258 is an abundant number, since it is smaller than the sum of its proper divisors (22315542).

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

20769258 is a wasteful number, since it uses less digits than its factorization.

20769258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 20769258 is about 4557.3301394567. The cubic root of 20769258 is about 274.8782182541.

The spelling of 20769258 in words is "twenty million, seven hundred sixty-nine thousand, two hundred fifty-eight".