20613423 has 16 divisors (see below), whose sum is σ = 29033600. Its totient is φ = 12972960.

The previous prime is 20613413. The next prime is 20613427. The reversal of 20613423 is 32431602.

It is a happy number.

It is not a de Polignac number, because 20613423 - 2⁴ = 20613407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20613423.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23568 + ... + 24426.

It is an arithmetic number, because the mean of its divisors is an integer number (1814600).

Almost surely, 2^20613423 is an apocalyptic number.

20613423 is a deficient number, since it is larger than the sum of its proper divisors (8420177).

20613423 is a wasteful number, since it uses less digits than its factorization.

20613423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20613423 is about 4540.2007664860. The cubic root of 20613423 is about 274.1890068218.

The spelling of 20613423 in words is "twenty million, six hundred thirteen thousand, four hundred twenty-three".