20453528519 has 4 divisors (see below), whose sum is σ = 21530030040. Its totient is φ = 19377027000.

The previous prime is 20453528507. The next prime is 20453528587. The reversal of 20453528519 is 91582535402.

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

It is a cyclic number.

It is not a de Polignac number, because 20453528519 - 2¹² = 20453524423 is a prime.

It is a super-2 number, since 2×20453528519² (a number of 21 digits) contains 22 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 20453528519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453528119) 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, 538250732 + ... + 538250769.

It is an arithmetic number, because the mean of its divisors is an integer number (5382507510).

Almost surely, 2^20453528519 is an apocalyptic number.

20453528519 is a deficient number, since it is larger than the sum of its proper divisors (1076501521).

20453528519 is a wasteful number, since it uses less digits than its factorization.

20453528519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076501520.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 20453528519 in words is "twenty billion, four hundred fifty-three million, five hundred twenty-eight thousand, five hundred nineteen".