19621046519 has 8 divisors (see below), whose sum is σ = 21491613360. Its totient is φ = 17830078336.

The previous prime is 19621046513. The next prime is 19621046539. The reversal of 19621046519 is 91564012691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19621046519 is a prime.

It is a super-2 number, since 2×19621046519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19621046519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621046513) 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, 19899149 + ... + 19900134.

It is an arithmetic number, because the mean of its divisors is an integer number (2686451670).

Almost surely, 2^19621046519 is an apocalyptic number.

19621046519 is a deficient number, since it is larger than the sum of its proper divisors (1870566841).

19621046519 is a wasteful number, since it uses less digits than its factorization.

19621046519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39799329.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 19621046519 in words is "nineteen billion, six hundred twenty-one million, forty-six thousand, five hundred nineteen".