20053990 has 16 divisors (see below), whose sum is σ = 39378960. Its totient is φ = 7292320.

The previous prime is 20053951. The next prime is 20053991. The reversal of 20053990 is 9935002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20053991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91045 + ... + 91264.

It is an arithmetic number, because the mean of its divisors is an integer number (2461185).

Almost surely, 2^20053990 is an apocalyptic number.

20053990 is a deficient number, since it is larger than the sum of its proper divisors (19324970).

20053990 is a wasteful number, since it uses less digits than its factorization.

20053990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182327.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 20053990 is about 4478.1681522694. The cubic root of 20053990 is about 271.6857945473.

Adding to 20053990 its reverse (9935002), we get a palindrome (29988992).

It can be divided in two parts, 2005 and 3990, that added together give a palindrome (5995).

The spelling of 20053990 in words is "twenty million, fifty-three thousand, nine hundred ninety".