20933613 has 32 divisors (see below), whose sum is σ = 33436800. Its totient is φ = 12895488.

The previous prime is 20933603. The next prime is 20933623. The reversal of 20933613 is 31633902.

It is an interprime number because it is at equal distance from previous prime (20933603) and next prime (20933623).

It is not a de Polignac number, because 20933613 - 2¹⁴ = 20917229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26695 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (1044900).

Almost surely, 2^20933613 is an apocalyptic number.

It is an amenable number.

20933613 is a deficient number, since it is larger than the sum of its proper divisors (12503187).

20933613 is a wasteful number, since it uses less digits than its factorization.

20933613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 20933613 is about 4575.3265457233. The cubic root of 20933613 is about 275.6013858246.

The spelling of 20933613 in words is "twenty million, nine hundred thirty-three thousand, six hundred thirteen".