20368438 has 4 divisors (see below), whose sum is σ = 30552660. Its totient is φ = 10184218.

The previous prime is 20368423. The next prime is 20368441. The reversal of 20368438 is 83486302.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5092108 + ... + 5092111.

It is an arithmetic number, because the mean of its divisors is an integer number (7638165).

Almost surely, 2^20368438 is an apocalyptic number.

20368438 is a deficient number, since it is larger than the sum of its proper divisors (10184222).

20368438 is a wasteful number, since it uses less digits than its factorization.

20368438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10184221.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 20368438 is about 4513.1405916501. The cubic root of 20368438 is about 273.0984541154.

The spelling of 20368438 in words is "twenty million, three hundred sixty-eight thousand, four hundred thirty-eight".