19829000385 has 12 divisors (see below), whose sum is σ = 34370267412. Its totient is φ = 10575466848.

The previous prime is 19829000383. The next prime is 19829000453. The reversal of 19829000385 is 58300092891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7732740096 + 12096260289 = 87936^2 + 109983^2 .

It is not a de Polignac number, because 19829000385 - 2¹ = 19829000383 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 440644453 = 19829000385 / (1 + 9 + 8 + 2 + 9 + 0 + 0 + 0 + 3 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 19829000385.

It is not an unprimeable number, because it can be changed into a prime (19829000383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220322182 + ... + 220322271.

It is an arithmetic number, because the mean of its divisors is an integer number (2864188951).

Almost surely, 2^19829000385 is an apocalyptic number.

19829000385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19829000385 is a deficient number, since it is larger than the sum of its proper divisors (14541267027).

19829000385 is a wasteful number, since it uses less digits than its factorization.

19829000385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440644464 (or 440644461 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 19829000385 in words is "nineteen billion, eight hundred twenty-nine million, three hundred eighty-five", and thus it is an aban number.