42002020 has 24 divisors (see below), whose sum is σ = 90082944. Its totient is φ = 16442976.

The previous prime is 42002017. The next prime is 42002029. The reversal of 42002020 is 2020024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 42001988 and 42002006.

It is not an unprimeable number, because it can be changed into a prime (42002029) 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, 21402 + ... + 23281.

It is an arithmetic number, because the mean of its divisors is an integer number (3753456).

Almost surely, 2^42002020 is an apocalyptic number.

It is an amenable number.

42002020 is an abundant number, since it is smaller than the sum of its proper divisors (48080924).

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

42002020 is a wasteful number, since it uses less digits than its factorization.

42002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44739 (or 44737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 42002020 is about 6480.8965429175. The cubic root of 42002020 is about 347.6082370769.

Adding to 42002020 its reverse (2020024), we get a palindrome (44022044).

The spelling of 42002020 in words is "forty-two million, two thousand, twenty".