20013423 has 8 divisors (see below), whose sum is σ = 26711088. Its totient is φ = 13329024.

The previous prime is 20013421. The next prime is 20013439. The reversal of 20013423 is 32431002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20013423 - 2¹ = 20013421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013421) 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 7 ways as a sum of consecutive naturals, for example, 1015 + ... + 6407.

It is an arithmetic number, because the mean of its divisors is an integer number (3338886).

Almost surely, 2^20013423 is an apocalyptic number.

20013423 is a deficient number, since it is larger than the sum of its proper divisors (6697665).

20013423 is a wasteful number, since it uses less digits than its factorization.

20013423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20013423 is about 4473.6364403022. The cubic root of 20013423 is about 271.5024741252.

Adding to 20013423 its reverse (32431002), we get a palindrome (52444425).

The spelling of 20013423 in words is "twenty million, thirteen thousand, four hundred twenty-three".