219986743021 has 8 divisors (see below), whose sum is σ = 224238903840. Its totient is φ = 215772718512.

The previous prime is 219986743007. The next prime is 219986743057. The reversal of 219986743021 is 120347689912.

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 219986743021 - 2⁷ = 219986742893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 219986743021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219986743091) 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, 9522430 + ... + 9545503.

It is an arithmetic number, because the mean of its divisors is an integer number (28029862980).

Almost surely, 2^219986743021 is an apocalyptic number.

It is an amenable number.

219986743021 is a deficient number, since it is larger than the sum of its proper divisors (4252160819).

219986743021 is a wasteful number, since it uses less digits than its factorization.

219986743021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19068155.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 219986743021 in words is "two hundred nineteen billion, nine hundred eighty-six million, seven hundred forty-three thousand, twenty-one".