20776434 has 16 divisors (see below), whose sum is σ = 47489088. Its totient is φ = 5936112.

The previous prime is 20776433. The next prime is 20776451. The reversal of 20776434 is 43467702.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20776395 and 20776404.

It is not an unprimeable number, because it can be changed into a prime (20776433) 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 7 ways as a sum of consecutive naturals, for example, 247297 + ... + 247380.

It is an arithmetic number, because the mean of its divisors is an integer number (2968068).

Almost surely, 2^20776434 is an apocalyptic number.

20776434 is an abundant number, since it is smaller than the sum of its proper divisors (26712654).

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

20776434 is a wasteful number, since it uses less digits than its factorization.

20776434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494689.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 20776434 is about 4558.1173745308. The cubic root of 20776434 is about 274.9098723935.

The spelling of 20776434 in words is "twenty million, seven hundred seventy-six thousand, four hundred thirty-four".