20995353519 has 16 divisors (see below), whose sum is σ = 32857594368. Its totient is φ = 11673091872.

The previous prime is 20995353479. The next prime is 20995353521. The reversal of 20995353519 is 91535359902.

It is not a de Polignac number, because 20995353519 - 2⁸ = 20995353263 is a prime.

It is a super-2 number, since 2×20995353519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995353529) 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, 13509747 + ... + 13511300.

It is an arithmetic number, because the mean of its divisors is an integer number (2053599648).

Almost surely, 2^20995353519 is an apocalyptic number.

20995353519 is a deficient number, since it is larger than the sum of its proper divisors (11862240849).

20995353519 is a wasteful number, since it uses less digits than its factorization.

20995353519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27021094.

The product of its (nonzero) digits is 1640250, while the sum is 51.

The spelling of 20995353519 in words is "twenty billion, nine hundred ninety-five million, three hundred fifty-three thousand, five hundred nineteen".