20779274 has 16 divisors (see below), whose sum is σ = 33698400. Its totient is φ = 9576144.

The previous prime is 20779273. The next prime is 20779289. The reversal of 20779274 is 47297702.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (20779273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5984 + ... + 8795.

It is an arithmetic number, because the mean of its divisors is an integer number (2106150).

Almost surely, 2^20779274 is an apocalyptic number.

20779274 is a deficient number, since it is larger than the sum of its proper divisors (12919126).

20779274 is a wasteful number, since it uses less digits than its factorization.

20779274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14837.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 20779274 is about 4558.4288960123. The cubic root of 20779274 is about 274.9223979383.

The spelling of 20779274 in words is "twenty million, seven hundred seventy-nine thousand, two hundred seventy-four".