20973205 has 16 divisors (see below), whose sum is σ = 28343808. Its totient is φ = 14760000.

The previous prime is 20973179. The next prime is 20973229. The reversal of 20973205 is 50237902.

It is not a de Polignac number, because 20973205 - 2¹¹ = 20971157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4446 + ... + 7855.

It is an arithmetic number, because the mean of its divisors is an integer number (1771488).

Almost surely, 2^20973205 is an apocalyptic number.

It is an amenable number.

20973205 is a deficient number, since it is larger than the sum of its proper divisors (7370603).

20973205 is a wasteful number, since it uses less digits than its factorization.

20973205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12348.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20973205 is about 4579.6511875906. The cubic root of 20973205 is about 275.7750258328.

The spelling of 20973205 in words is "twenty million, nine hundred seventy-three thousand, two hundred five".