20926706 has 4 divisors (see below), whose sum is σ = 31390062. Its totient is φ = 10463352.

The previous prime is 20926699. The next prime is 20926723. The reversal of 20926706 is 60762902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 4239481 = 4085^2 + 2059^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5231675 + ... + 5231678.

Almost surely, 2^20926706 is an apocalyptic number.

20926706 is a deficient number, since it is larger than the sum of its proper divisors (10463356).

20926706 is a wasteful number, since it uses less digits than its factorization.

20926706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463355.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20926706 is about 4574.5716739384. The cubic root of 20926706 is about 275.5710711313.

The spelling of 20926706 in words is "twenty million, nine hundred twenty-six thousand, seven hundred six".