42423123432 has 32 divisors (see below), whose sum is σ = 106144178400. Its totient is φ = 14129525184.

The previous prime is 42423123397. The next prime is 42423123439. The reversal of 42423123432 is 23432132424.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 42423123432.

It is not an unprimeable number, because it can be changed into a prime (42423123439) 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, 689638 + ... + 748629.

It is an arithmetic number, because the mean of its divisors is an integer number (3317005575).

Almost surely, 2^42423123432 is an apocalyptic number.

It is an amenable number.

42423123432 is an abundant number, since it is smaller than the sum of its proper divisors (63721054968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42423123432 is a wasteful number, since it uses less digits than its factorization.

42423123432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439505 (or 1439501 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

Adding to 42423123432 its reverse (23432132424), we get a palindrome (65855255856).

The spelling of 42423123432 in words is "forty-two billion, four hundred twenty-three million, one hundred twenty-three thousand, four hundred thirty-two".