20777043 has 16 divisors (see below), whose sum is σ = 33523200. Its totient is φ = 11174016.

The previous prime is 20777039. The next prime is 20777059. The reversal of 20777043 is 34077702.

It is a happy number.

It is not a de Polignac number, because 20777043 - 2² = 20777039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20777043.

It is not an unprimeable number, because it can be changed into a prime (20777023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28743 + ... + 29456.

It is an arithmetic number, because the mean of its divisors is an integer number (2095200).

Almost surely, 2^20777043 is an apocalyptic number.

20777043 is a deficient number, since it is larger than the sum of its proper divisors (12746157).

20777043 is a wasteful number, since it uses less digits than its factorization.

20777043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58226.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 20777043 is about 4558.1841779375. The cubic root of 20777043 is about 274.9125584251.

The spelling of 20777043 in words is "twenty million, seven hundred seventy-seven thousand, forty-three".