19821430375 has 8 divisors (see below), whose sum is σ = 24737145264. Its totient is φ = 15857144200.

The previous prime is 19821430271. The next prime is 19821430379. The reversal of 19821430375 is 57303412891.

It is not a de Polignac number, because 19821430375 - 2⁹ = 19821429863 is a prime.

It is a super-2 number, since 2×19821430375² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19821430379) 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, 79285597 + ... + 79285846.

It is an arithmetic number, because the mean of its divisors is an integer number (3092143158).

Almost surely, 2^19821430375 is an apocalyptic number.

19821430375 is a deficient number, since it is larger than the sum of its proper divisors (4915714889).

19821430375 is an equidigital number, since it uses as much as digits as its factorization.

19821430375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158571458 (or 158571448 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 19821430375 in words is "nineteen billion, eight hundred twenty-one million, four hundred thirty thousand, three hundred seventy-five".