20706722 has 16 divisors (see below), whose sum is σ = 31950072. Its totient is φ = 10058880.

The previous prime is 20706709. The next prime is 20706767. The reversal of 20706722 is 22760702.

It can be written as a sum of positive squares in 4 ways, for example, as 18913801 + 1792921 = 4349^2 + 1339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20706691 and 20706700.

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, 30248 + ... + 30924.

Almost surely, 2^20706722 is an apocalyptic number.

20706722 is a deficient number, since it is larger than the sum of its proper divisors (11243350).

20706722 is a wasteful number, since it uses less digits than its factorization.

20706722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20706722 is about 4550.4639323919. The cubic root of 20706722 is about 274.6020558298.

The spelling of 20706722 in words is "twenty million, seven hundred six thousand, seven hundred twenty-two".