42403320021 has 8 divisors (see below), whose sum is σ = 58487338080. Its totient is φ = 27294090992.

The previous prime is 42403320019. The next prime is 42403320041. The reversal of 42403320021 is 12002330424.

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 42403320021 - 2¹ = 42403320019 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42403320021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42403320041) 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, 243697155 + ... + 243697328.

It is an arithmetic number, because the mean of its divisors is an integer number (7310917260).

Almost surely, 2^42403320021 is an apocalyptic number.

It is an amenable number.

42403320021 is a deficient number, since it is larger than the sum of its proper divisors (16084018059).

42403320021 is a wasteful number, since it uses less digits than its factorization.

42403320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487394515.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 42403320021 its reverse (12002330424), we get a palindrome (54405650445).

The spelling of 42403320021 in words is "forty-two billion, four hundred three million, three hundred twenty thousand, twenty-one".