20613426 has 32 divisors (see below), whose sum is σ = 42630720. Its totient is φ = 6640704.

The previous prime is 20613413. The next prime is 20613427. The reversal of 20613426 is 62431602.

It is a junction number, because it is equal to n+sod(n) for n = 20613396 and 20613405.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27756 + ... + 28488.

It is an arithmetic number, because the mean of its divisors is an integer number (1332210).

Almost surely, 2^20613426 is an apocalyptic number.

20613426 is an abundant number, since it is smaller than the sum of its proper divisors (22017294).

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

20613426 is a wasteful number, since it uses less digits than its factorization.

20613426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20613426 is about 4540.2010968678. The cubic root of 20613426 is about 274.1890201233.

The spelling of 20613426 in words is "twenty million, six hundred thirteen thousand, four hundred twenty-six".