20845946 has 16 divisors (see below), whose sum is σ = 34201440. Its totient is φ = 9450480.

The previous prime is 20845943. The next prime is 20845963. The reversal of 20845946 is 64954802.

It is not an unprimeable number, because it can be changed into a prime (20845943) 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, 9260 + ... + 11288.

It is an arithmetic number, because the mean of its divisors is an integer number (2137590).

Almost surely, 2^20845946 is an apocalyptic number.

20845946 is a deficient number, since it is larger than the sum of its proper divisors (13355494).

20845946 is a wasteful number, since it uses less digits than its factorization.

20845946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 20845946 is about 4565.7360852331. The cubic root of 20845946 is about 275.2161210163.

The spelling of 20845946 in words is "twenty million, eight hundred forty-five thousand, nine hundred forty-six".