20777834 has 16 divisors (see below), whose sum is σ = 38857536. Its totient is φ = 8095200.

The previous prime is 20777797. The next prime is 20777837. The reversal of 20777834 is 43877702.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20777837) 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, 67307 + ... + 67614.

It is an arithmetic number, because the mean of its divisors is an integer number (2428596).

Almost surely, 2^20777834 is an apocalyptic number.

20777834 is a deficient number, since it is larger than the sum of its proper divisors (18079702).

20777834 is a wasteful number, since it uses less digits than its factorization.

20777834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134941.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 20777834 is about 4558.2709441191. The cubic root of 20777834 is about 274.9160471005.

The spelling of 20777834 in words is "twenty million, seven hundred seventy-seven thousand, eight hundred thirty-four".