20790453 has 4 divisors (see below), whose sum is σ = 27720608. Its totient is φ = 13860300.

The previous prime is 20790443. The next prime is 20790461. The reversal of 20790453 is 35409702.

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 not a de Polignac number, because 20790453 - 2⁴ = 20790437 is a prime.

It is a super-3 number, since 3×20790453³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20790453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790443) 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, 3465073 + ... + 3465078.

It is an arithmetic number, because the mean of its divisors is an integer number (6930152).

Almost surely, 2^20790453 is an apocalyptic number.

It is an amenable number.

20790453 is a deficient number, since it is larger than the sum of its proper divisors (6930155).

20790453 is an equidigital number, since it uses as much as digits as its factorization.

20790453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930154.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20790453 is about 4559.6549211536. The cubic root of 20790453 is about 274.9716907498.

The spelling of 20790453 in words is "twenty million, seven hundred ninety thousand, four hundred fifty-three".