42947721019 has 8 divisors (see below), whose sum is σ = 49107753440. Its totient is φ = 36793849536.

The previous prime is 42947720983. The next prime is 42947721023. The reversal of 42947721019 is 91012774924.

It is a happy number.

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 42947721019 - 2¹⁷ = 42947589947 is a prime.

It is a super-2 number, since 2×42947721019² (a number of 22 digits) contains 22 as substring.

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 42947721019.

It is not an unprimeable number, because it can be changed into a prime (42947721319) 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, 1525284 + ... + 1553185.

It is an arithmetic number, because the mean of its divisors is an integer number (6138469180).

Almost surely, 2^42947721019 is an apocalyptic number.

42947721019 is a deficient number, since it is larger than the sum of its proper divisors (6160032421).

42947721019 is a wasteful number, since it uses less digits than its factorization.

42947721019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080469.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 42947721019 in words is "forty-two billion, nine hundred forty-seven million, seven hundred twenty-one thousand, nineteen".