20342453 has 4 divisors (see below), whose sum is σ = 20370720. Its totient is φ = 20314188.

The previous prime is 20342447. The next prime is 20342461. The reversal of 20342453 is 35424302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35424302 = 2 ⋅17712151.

It is a cyclic number.

It is not a de Polignac number, because 20342453 - 2⁶ = 20342389 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 (20342753) 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, 13025 + ... + 14502.

It is an arithmetic number, because the mean of its divisors is an integer number (5092680).

Almost surely, 2^20342453 is an apocalyptic number.

It is an amenable number.

20342453 is a deficient number, since it is larger than the sum of its proper divisors (28267).

20342453 is an equidigital number, since it uses as much as digits as its factorization.

20342453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28266.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20342453 is about 4510.2608572011. The cubic root of 20342453 is about 272.9822697319.

Adding to 20342453 its reverse (35424302), we get a palindrome (55766755).

The spelling of 20342453 in words is "twenty million, three hundred forty-two thousand, four hundred fifty-three".