42430424021 has 4 divisors (see below), whose sum is σ = 43417178112. Its totient is φ = 41443669932.

The previous prime is 42430424017. The next prime is 42430424053. The reversal of 42430424021 is 12042403424.

It is a happy number.

42430424021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42430424021 - 2² = 42430424017 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 (42430424221) 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, 493376981 + ... + 493377066.

It is an arithmetic number, because the mean of its divisors is an integer number (10854294528).

Almost surely, 2^42430424021 is an apocalyptic number.

It is an amenable number.

42430424021 is a deficient number, since it is larger than the sum of its proper divisors (986754091).

42430424021 is an equidigital number, since it uses as much as digits as its factorization.

42430424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986754090.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 42430424021 its reverse (12042403424), we get a palindrome (54472827445).

The spelling of 42430424021 in words is "forty-two billion, four hundred thirty million, four hundred twenty-four thousand, twenty-one".