20965593 has 16 divisors (see below), whose sum is σ = 30650112. Its totient is φ = 12642000.

The previous prime is 20965577. The next prime is 20965597. The reversal of 20965593 is 39556902.

It is not a de Polignac number, because 20965593 - 2⁴ = 20965577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20965597) 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, 5458 + ... + 8468.

It is an arithmetic number, because the mean of its divisors is an integer number (1915632).

Almost surely, 2^20965593 is an apocalyptic number.

It is an amenable number.

20965593 is a deficient number, since it is larger than the sum of its proper divisors (9684519).

20965593 is a wasteful number, since it uses less digits than its factorization.

20965593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236.

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 20965593 is about 4578.8200445093. The cubic root of 20965593 is about 275.7416585989.

The spelling of 20965593 in words is "twenty million, nine hundred sixty-five thousand, five hundred ninety-three".