20893617 has 12 divisors (see below), whose sum is σ = 30226560. Its totient is φ = 13907448.

The previous prime is 20893603. The next prime is 20893643. The reversal of 20893617 is 71639802.

It is not a de Polignac number, because 20893617 - 2⁶ = 20893553 is a prime.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (20893687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6168 + ... + 8934.

It is an arithmetic number, because the mean of its divisors is an integer number (2518880).

Almost surely, 2^20893617 is an apocalyptic number.

It is an amenable number.

20893617 is a deficient number, since it is larger than the sum of its proper divisors (9332943).

20893617 is a wasteful number, since it uses less digits than its factorization.

20893617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612 (or 3609 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20893617 is about 4570.9536204166. The cubic root of 20893617 is about 275.4257515360.

The spelling of 20893617 in words is "twenty million, eight hundred ninety-three thousand, six hundred seventeen".