20553519459 has 16 divisors (see below), whose sum is σ = 29915182080. Its totient is φ = 12448697760.

The previous prime is 20553519403. The next prime is 20553519521. The reversal of 20553519459 is 95491535502.

It is not a de Polignac number, because 20553519459 - 2¹⁵ = 20553486691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20553519559) 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, 147024 + ... + 250445.

It is an arithmetic number, because the mean of its divisors is an integer number (1869698880).

Almost surely, 2^20553519459 is an apocalyptic number.

20553519459 is a deficient number, since it is larger than the sum of its proper divisors (9361662621).

20553519459 is a wasteful number, since it uses less digits than its factorization.

20553519459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399050.

The product of its (nonzero) digits is 1215000, while the sum is 48.

The spelling of 20553519459 in words is "twenty billion, five hundred fifty-three million, five hundred nineteen thousand, four hundred fifty-nine".