20959395 has 16 divisors (see below), whose sum is σ = 33996192. Its totient is φ = 11024640.

The previous prime is 20959387. The next prime is 20959397. The reversal of 20959395 is 59395902.

It is not a de Polignac number, because 20959395 - 2³ = 20959387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20959397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8476 + ... + 10665.

It is an arithmetic number, because the mean of its divisors is an integer number (2124762).

Almost surely, 2^20959395 is an apocalyptic number.

20959395 is a deficient number, since it is larger than the sum of its proper divisors (13036797).

20959395 is a wasteful number, since it uses less digits than its factorization.

20959395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19222.

The product of its (nonzero) digits is 109350, while the sum is 42.

The square root of 20959395 is about 4578.1431825577. The cubic root of 20959395 is about 275.7144836741.

The spelling of 20959395 in words is "twenty million, nine hundred fifty-nine thousand, three hundred ninety-five".