42240021403 has 4 divisors (see below), whose sum is σ = 42315048648. Its totient is φ = 42164994160.

The previous prime is 42240021401. The next prime is 42240021449. The reversal of 42240021403 is 30412004224.

It is a happy number.

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 42240021403 - 2¹ = 42240021401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42240021401) 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, 37512778 + ... + 37513903.

It is an arithmetic number, because the mean of its divisors is an integer number (10578762162).

Almost surely, 2^42240021403 is an apocalyptic number.

42240021403 is a deficient number, since it is larger than the sum of its proper divisors (75027245).

42240021403 is an equidigital number, since it uses as much as digits as its factorization.

42240021403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75027244.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 42240021403 its reverse (30412004224), we get a palindrome (72652025627).

The spelling of 42240021403 in words is "forty-two billion, two hundred forty million, twenty-one thousand, four hundred three".