21470719197 has 8 divisors (see below), whose sum is σ = 28630506240. Its totient is φ = 14312372480.

The previous prime is 21470719147. The next prime is 21470719201. The reversal of 21470719197 is 79191707412.

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

It is a cyclic number.

It is not a de Polignac number, because 21470719197 - 2⁷ = 21470719069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470719147) 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, 324804 + ... + 385277.

It is an arithmetic number, because the mean of its divisors is an integer number (3578813280).

Almost surely, 2^21470719197 is an apocalyptic number.

It is an amenable number.

21470719197 is a deficient number, since it is larger than the sum of its proper divisors (7159787043).

21470719197 is a wasteful number, since it uses less digits than its factorization.

21470719197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720163.

The product of its (nonzero) digits is 222264, while the sum is 48.

The spelling of 21470719197 in words is "twenty-one billion, four hundred seventy million, seven hundred nineteen thousand, one hundred ninety-seven".