21498347519 has 8 divisors (see below), whose sum is σ = 23660290512. Its totient is φ = 19370995840.

The previous prime is 21498347473. The next prime is 21498347531. The reversal of 21498347519 is 91574389412.

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

It is a cyclic number.

It is not a de Polignac number, because 21498347519 - 2¹⁶ = 21498281983 is a prime.

It is a super-2 number, since 2×21498347519² (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 (21498347539) 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, 8646524 + ... + 8649009.

It is an arithmetic number, because the mean of its divisors is an integer number (2957536314).

Almost surely, 2^21498347519 is an apocalyptic number.

21498347519 is a deficient number, since it is larger than the sum of its proper divisors (2161942993).

21498347519 is a wasteful number, since it uses less digits than its factorization.

21498347519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17295657.

The product of its digits is 2177280, while the sum is 53.

The spelling of 21498347519 in words is "twenty-one billion, four hundred ninety-eight million, three hundred forty-seven thousand, five hundred nineteen".