19836031971 has 40 divisors (see below), whose sum is σ = 31226892480. Its totient is φ = 11197973136.

The previous prime is 19836031949. The next prime is 19836032003. The reversal of 19836031971 is 17913063891.

It is not a de Polignac number, because 19836031971 - 2¹⁴ = 19836015587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19836031971.

It is not an unprimeable number, because it can be changed into a prime (19836031931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 581260 + ... + 614438.

It is an arithmetic number, because the mean of its divisors is an integer number (780672312).

Almost surely, 2^19836031971 is an apocalyptic number.

19836031971 is a deficient number, since it is larger than the sum of its proper divisors (11390860509).

19836031971 is an frugal number, since it uses more digits than its factorization.

19836031971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33293 (or 33272 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 19836031971 in words is "nineteen billion, eight hundred thirty-six million, thirty-one thousand, nine hundred seventy-one".