20894973 has 32 divisors (see below), whose sum is σ = 31701120. Its totient is φ = 12130560.

The previous prime is 20894969. The next prime is 20894983. The reversal of 20894973 is 37949802.

It is not a de Polignac number, because 20894973 - 2² = 20894969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133011 + ... + 133167.

It is an arithmetic number, because the mean of its divisors is an integer number (990660).

Almost surely, 2^20894973 is an apocalyptic number.

It is an amenable number.

20894973 is a deficient number, since it is larger than the sum of its proper divisors (10806147).

20894973 is a wasteful number, since it uses less digits than its factorization.

20894973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 20894973 is about 4571.1019459207. The cubic root of 20894973 is about 275.4317098029.

The spelling of 20894973 in words is "twenty million, eight hundred ninety-four thousand, nine hundred seventy-three".