19850000047 has 4 divisors (see below), whose sum is σ = 19899501696. Its totient is φ = 19800498400.

The previous prime is 19850000029. The next prime is 19850000111. The reversal of 19850000047 is 74000005891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19850000047 - 2²⁷ = 19715782319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19849999967 and 19850000021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19850000147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24750223 + ... + 24751024.

It is an arithmetic number, because the mean of its divisors is an integer number (4974875424).

Almost surely, 2^19850000047 is an apocalyptic number.

19850000047 is a deficient number, since it is larger than the sum of its proper divisors (49501649).

19850000047 is an equidigital number, since it uses as much as digits as its factorization.

19850000047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49501648.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 19850000047 in words is "nineteen billion, eight hundred fifty million, forty-seven", and thus it is an aban number.