20445706 has 8 divisors (see below), whose sum is σ = 30966624. Its totient is φ = 10123500.

The previous prime is 20445701. The next prime is 20445739. The reversal of 20445706 is 60754402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20445701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49420 + ... + 49831.

It is an arithmetic number, because the mean of its divisors is an integer number (3870828).

Almost surely, 2^20445706 is an apocalyptic number.

20445706 is a deficient number, since it is larger than the sum of its proper divisors (10520918).

20445706 is a wasteful number, since it uses less digits than its factorization.

20445706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99356.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20445706 is about 4521.6928245957. The cubic root of 20445706 is about 273.4433528282.

It can be divided in two parts, 2044 and 5706, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 20445706 in words is "twenty million, four hundred forty-five thousand, seven hundred six".