42340020 has 48 divisors (see below), whose sum is σ = 119266560. Its totient is φ = 11222656.

The previous prime is 42340009. The next prime is 42340027. The reversal of 42340020 is 2004324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42340027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8341 + ... + 12419.

It is an arithmetic number, because the mean of its divisors is an integer number (2484720).

Almost surely, 2^42340020 is an apocalyptic number.

It is an amenable number.

42340020 is an abundant number, since it is smaller than the sum of its proper divisors (76926540).

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

42340020 is a wasteful number, since it uses less digits than its factorization.

42340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264 (or 4262 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 42340020 is about 6506.9209308243. The cubic root of 42340020 is about 348.5381750888.

Adding to 42340020 its reverse (2004324), we get a palindrome (44344344).

The spelling of 42340020 in words is "forty-two million, three hundred forty thousand, twenty".