20449453 has 8 divisors (see below), whose sum is σ = 22792320. Its totient is φ = 18233280.

The previous prime is 20449433. The next prime is 20449469. The reversal of 20449453 is 35494402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20449453 - 2⁵ = 20449421 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 (20449433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31333 + ... + 31978.

It is an arithmetic number, because the mean of its divisors is an integer number (2849040).

Almost surely, 2^20449453 is an apocalyptic number.

It is an amenable number.

20449453 is a deficient number, since it is larger than the sum of its proper divisors (2342867).

20449453 is a wasteful number, since it uses less digits than its factorization.

20449453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63347.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20449453 is about 4522.1071415879. The cubic root of 20449453 is about 273.4600560854.

It can be divided in two parts, 20449 and 453, that added together give a palindrome (20902).

The spelling of 20449453 in words is "twenty million, four hundred forty-nine thousand, four hundred fifty-three".