21364395519 has 8 divisors (see below), whose sum is σ = 29404759552. Its totient is φ = 13783480920.

The previous prime is 21364395421. The next prime is 21364395523. The reversal of 21364395519 is 91559346312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21364395519 - 2⁹ = 21364395007 is a prime.

It is a super-2 number, since 2×21364395519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364395599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114862249 + ... + 114862434.

It is an arithmetic number, because the mean of its divisors is an integer number (3675594944).

Almost surely, 2^21364395519 is an apocalyptic number.

21364395519 is a deficient number, since it is larger than the sum of its proper divisors (8040364033).

21364395519 is a wasteful number, since it uses less digits than its factorization.

21364395519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229724717.

The product of its digits is 874800, while the sum is 48.

The spelling of 21364395519 in words is "twenty-one billion, three hundred sixty-four million, three hundred ninety-five thousand, five hundred nineteen".