20843097842 has 8 divisors (see below), whose sum is σ = 35731024896. Its totient is φ = 8932756212.

The previous prime is 20843097817. The next prime is 20843097851. The reversal of 20843097842 is 24879034802.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 744396338 + ... + 744396365.

It is an arithmetic number, because the mean of its divisors is an integer number (4466378112).

Almost surely, 2^20843097842 is an apocalyptic number.

20843097842 is a deficient number, since it is larger than the sum of its proper divisors (14887927054).

20843097842 is a wasteful number, since it uses less digits than its factorization.

20843097842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488792712.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 20843097842 in words is "twenty billion, eight hundred forty-three million, ninety-seven thousand, eight hundred forty-two".