42009105632 has 24 divisors (see below), whose sum is σ = 89067383496. Its totient is φ = 19388817792.

The previous prime is 42009105631. The next prime is 42009105689. The reversal of 42009105632 is 23650190024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42009105631) 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, 50491298 + ... + 50492129.

It is an arithmetic number, because the mean of its divisors is an integer number (3711140979).

Almost surely, 2^42009105632 is an apocalyptic number.

It is an amenable number.

42009105632 is an abundant number, since it is smaller than the sum of its proper divisors (47058277864).

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

42009105632 is a wasteful number, since it uses less digits than its factorization.

42009105632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100983450 (or 100983442 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 42009105632 its reverse (23650190024), we get a palindrome (65659295656).

The spelling of 42009105632 in words is "forty-two billion, nine million, one hundred five thousand, six hundred thirty-two".