16971820402 has 8 divisors (see below), whose sum is σ = 25461697500. Its totient is φ = 8484587904.

The previous prime is 16971820291. The next prime is 16971820403. The reversal of 16971820402 is 20402817961.

It can be written as a sum of positive squares in 2 ways, for example, as 16965323001 + 6497401 = 130251^2 + 2549^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16971820403) 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, 645027 + ... + 670822.

Almost surely, 2^16971820402 is an apocalyptic number.

16971820402 is a deficient number, since it is larger than the sum of its proper divisors (8489877098).

16971820402 is a wasteful number, since it uses less digits than its factorization.

16971820402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322300.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 16971820402 in words is "sixteen billion, nine hundred seventy-one million, eight hundred twenty thousand, four hundred two".