20934613 has 6 divisors (see below), whose sum is σ = 24352566. Its totient is φ = 17943912.

The previous prime is 20934611. The next prime is 20934653. The reversal of 20934613 is 31643902.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 1238769 = 4438^2 + 1113^2 .

It is not a de Polignac number, because 20934613 - 2¹ = 20934611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213570 + ... + 213667.

It is an arithmetic number, because the mean of its divisors is an integer number (4058761).

Almost surely, 2^20934613 is an apocalyptic number.

It is an amenable number.

20934613 is a deficient number, since it is larger than the sum of its proper divisors (3417953).

20934613 is an equidigital number, since it uses as much as digits as its factorization.

20934613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427251 (or 427244 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20934613 is about 4575.4358262356. The cubic root of 20934613 is about 275.6057742532.

The spelling of 20934613 in words is "twenty million, nine hundred thirty-four thousand, six hundred thirteen".