20473457453 has 4 divisors (see below), whose sum is σ = 20507523708. Its totient is φ = 20439391200.

The previous prime is 20473457447. The next prime is 20473457471. The reversal of 20473457453 is 35475437402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13243866724 + 7229590729 = 115082^2 + 85027^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473457453 - 2¹⁰ = 20473456429 is a prime.

It is a super-4 number, since 4×20473457453⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473457443) 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, 17032226 + ... + 17033427.

It is an arithmetic number, because the mean of its divisors is an integer number (5126880927).

Almost surely, 2^20473457453 is an apocalyptic number.

It is an amenable number.

20473457453 is a deficient number, since it is larger than the sum of its proper divisors (34066255).

20473457453 is an equidigital number, since it uses as much as digits as its factorization.

20473457453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34066254.

The product of its (nonzero) digits is 1411200, while the sum is 44.

The spelling of 20473457453 in words is "twenty billion, four hundred seventy-three million, four hundred fifty-seven thousand, four hundred fifty-three".