20490053 has 4 divisors (see below), whose sum is σ = 20651520. Its totient is φ = 20328588.

The previous prime is 20490047. The next prime is 20490077. The reversal of 20490053 is 35009402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20490053 - 2¹⁴ = 20473669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20490023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80543 + ... + 80796.

It is an arithmetic number, because the mean of its divisors is an integer number (5162880).

Almost surely, 2^20490053 is an apocalyptic number.

It is an amenable number.

20490053 is a deficient number, since it is larger than the sum of its proper divisors (161467).

20490053 is a wasteful number, since it uses less digits than its factorization.

20490053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161466.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20490053 is about 4526.5939733977. The cubic root of 20490053 is about 273.6409107813.

Adding to 20490053 its reverse (35009402), we get a palindrome (55499455).

The spelling of 20490053 in words is "twenty million, four hundred ninety thousand, fifty-three".