20448519 has 16 divisors (see below), whose sum is σ = 33556992. Its totient is φ = 10785888.

The previous prime is 20448511. The next prime is 20448553. The reversal of 20448519 is 91584402.

It is not a de Polignac number, because 20448519 - 2³ = 20448511 is a prime.

It is a super-2 number, since 2×20448519² = 836283858586722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20448519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37179 + ... + 37724.

It is an arithmetic number, because the mean of its divisors is an integer number (2097312).

Almost surely, 2^20448519 is an apocalyptic number.

20448519 is a deficient number, since it is larger than the sum of its proper divisors (13108473).

20448519 is a wasteful number, since it uses less digits than its factorization.

20448519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74926.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20448519 is about 4522.0038699674. The cubic root of 20448519 is about 273.4558927209.

The spelling of 20448519 in words is "twenty million, four hundred forty-eight thousand, five hundred nineteen".