4242020202391 has 4 divisors (see below), whose sum is σ = 4263999581872. Its totient is φ = 4220040822912.

The previous prime is 4242020202361. The next prime is 4242020202403. The reversal of 4242020202391 is 1932020202424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4242020202391 - 2⁷ = 4242020202263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4242020202311) 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, 10989689451 + ... + 10989689836.

It is an arithmetic number, because the mean of its divisors is an integer number (1065999895468).

Almost surely, 2^{4242020202391} is an apocalyptic number.

4242020202391 is a deficient number, since it is larger than the sum of its proper divisors (21979379481).

4242020202391 is a wasteful number, since it uses less digits than its factorization.

4242020202391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21979379480.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 4242020202391 in words is "four trillion, two hundred forty-two billion, twenty million, two hundred two thousand, three hundred ninety-one".