20986593 has 8 divisors (see below), whose sum is σ = 28196256. Its totient is φ = 13884000.

The previous prime is 20986577. The next prime is 20986601. The reversal of 20986593 is 39568902.

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

It is not a de Polignac number, because 20986593 - 2⁴ = 20986577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20986093) 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, 26308 + ... + 27093.

It is an arithmetic number, because the mean of its divisors is an integer number (3524532).

Almost surely, 2^20986593 is an apocalyptic number.

It is an amenable number.

20986593 is a deficient number, since it is larger than the sum of its proper divisors (7209663).

20986593 is a wasteful number, since it uses less digits than its factorization.

20986593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53535.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 20986593 is about 4581.1126377770. The cubic root of 20986593 is about 275.8336926051.

The spelling of 20986593 in words is "twenty million, nine hundred eighty-six thousand, five hundred ninety-three".