20613424 has 20 divisors (see below), whose sum is σ = 43011136. Its totient is φ = 9513792.

The previous prime is 20613413. The next prime is 20613427. The reversal of 20613424 is 42431602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20613395 and 20613404.

It is not an unprimeable number, because it can be changed into a prime (20613427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49344 + ... + 49759.

Almost surely, 2^20613424 is an apocalyptic number.

It is an amenable number.

20613424 is an abundant number, since it is smaller than the sum of its proper divisors (22397712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20613424 is a wasteful number, since it uses less digits than its factorization.

20613424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99124 (or 99118 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20613424 is about 4540.2008766133. The cubic root of 20613424 is about 274.1890112557.

The spelling of 20613424 in words is "twenty million, six hundred thirteen thousand, four hundred twenty-four".