20586945 has 16 divisors (see below), whose sum is σ = 34002432. Its totient is φ = 10625280.

The previous prime is 20586913. The next prime is 20586953. The reversal of 20586945 is 54968502.

It is not a de Polignac number, because 20586945 - 2⁵ = 20586913 is a prime.

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, 21672 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (2125152).

Almost surely, 2^20586945 is an apocalyptic number.

It is an amenable number.

20586945 is a deficient number, since it is larger than the sum of its proper divisors (13415487).

20586945 is a wasteful number, since it uses less digits than its factorization.

20586945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44312.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 20586945 is about 4537.2838791506. The cubic root of 20586945 is about 274.0715576686.

The spelling of 20586945 in words is "twenty million, five hundred eighty-six thousand, nine hundred forty-five".