20453519 has 4 divisors (see below), whose sum is σ = 21530040. Its totient is φ = 19377000.

The previous prime is 20453501. The next prime is 20453527. The reversal of 20453519 is 91535402.

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 20453519 - 2²⁴ = 3676303 is a prime.

It is a super-2 number, since 2×20453519² = 836692878966722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20453491 and 20453500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538232 + ... + 538269.

It is an arithmetic number, because the mean of its divisors is an integer number (5382510).

Almost surely, 2^20453519 is an apocalyptic number.

20453519 is a deficient number, since it is larger than the sum of its proper divisors (1076521).

20453519 is a wasteful number, since it uses less digits than its factorization.

20453519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076520.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20453519 is about 4522.5566884230. The cubic root of 20453519 is about 273.4781790625.

The spelling of 20453519 in words is "twenty million, four hundred fifty-three thousand, five hundred nineteen".