20777042 has 16 divisors (see below), whose sum is σ = 36614592. Its totient is φ = 8717520.

The previous prime is 20777039. The next prime is 20777059. The reversal of 20777042 is 24077702.

It is a junction number, because it is equal to n+sod(n) for n = 20776996 and 20777014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36038 + ... + 36609.

It is an arithmetic number, because the mean of its divisors is an integer number (2288412).

Almost surely, 2^20777042 is an apocalyptic number.

20777042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20777042 is a deficient number, since it is larger than the sum of its proper divisors (15837550).

20777042 is a wasteful number, since it uses less digits than its factorization.

20777042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72673.

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 20777042 is about 4558.1840682447. The cubic root of 20777042 is about 274.9125540146.

It can be divided in two parts, 2077 and 7042, that added together give a palindrome (9119).

The spelling of 20777042 in words is "twenty million, seven hundred seventy-seven thousand, forty-two".