20042793 has 12 divisors (see below), whose sum is σ = 29023488. Its totient is φ = 13328280.

The previous prime is 20042791. The next prime is 20042801. The reversal of 20042793 is 39724002.

It is not a de Polignac number, because 20042793 - 2¹ = 20042791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20042791) 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 11 ways as a sum of consecutive naturals, for example, 1296 + ... + 6462.

It is an arithmetic number, because the mean of its divisors is an integer number (2418624).

Almost surely, 2^20042793 is an apocalyptic number.

It is an amenable number.

20042793 is a deficient number, since it is larger than the sum of its proper divisors (8980695).

20042793 is a wasteful number, since it uses less digits than its factorization.

20042793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604 (or 5601 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20042793 is about 4476.9178013450. The cubic root of 20042793 is about 271.6352205354.

Adding to 20042793 its reverse (39724002), we get a palindrome (59766795).

The spelling of 20042793 in words is "twenty million, forty-two thousand, seven hundred ninety-three".