20023894 has 8 divisors (see below), whose sum is σ = 32766408. Its totient is φ = 9101760.

The previous prime is 20023889. The next prime is 20023901. The reversal of 20023894 is 49832002.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 455067 + ... + 455110.

It is an arithmetic number, because the mean of its divisors is an integer number (4095801).

Almost surely, 2^20023894 is an apocalyptic number.

20023894 is a deficient number, since it is larger than the sum of its proper divisors (12742514).

20023894 is a wasteful number, since it uses less digits than its factorization.

20023894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910190.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20023894 is about 4474.8065879991. The cubic root of 20023894 is about 271.5498157977.

Adding to 20023894 its reverse (49832002), we get a palindrome (69855896).

The spelling of 20023894 in words is "twenty million, twenty-three thousand, eight hundred ninety-four".