20735453 has 4 divisors (see below), whose sum is σ = 20750688. Its totient is φ = 20720220.

The previous prime is 20735447. The next prime is 20735467. The reversal of 20735453 is 35453702.

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 20735453 - 2⁴ = 20735437 is a prime.

It is a super-2 number, since 2×20735453² = 859918022230418, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20735483) 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, 5351 + ... + 8372.

It is an arithmetic number, because the mean of its divisors is an integer number (5187672).

Almost surely, 2^20735453 is an apocalyptic number.

It is an amenable number.

20735453 is a deficient number, since it is larger than the sum of its proper divisors (15235).

20735453 is a wasteful number, since it uses less digits than its factorization.

20735453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15234.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 20735453 is about 4553.6197689311. The cubic root of 20735453 is about 274.7290024559.

The spelling of 20735453 in words is "twenty million, seven hundred thirty-five thousand, four hundred fifty-three".