422402040020 has 24 divisors (see below), whose sum is σ = 900283753824. Its totient is φ = 166439012256.

The previous prime is 422402040017. The next prime is 422402040077. The reversal of 422402040020 is 20040204224.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 422402039974 and 422402040001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157611362 + ... + 157614041.

It is an arithmetic number, because the mean of its divisors is an integer number (37511823076).

Almost surely, 2^422402040020 is an apocalyptic number.

It is an amenable number.

422402040020 is an abundant number, since it is smaller than the sum of its proper divisors (477881713804).

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

422402040020 is a wasteful number, since it uses less digits than its factorization.

422402040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315225479 (or 315225477 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 422402040020 its reverse (20040204224), we get a palindrome (442442244244).

The spelling of 422402040020 in words is "four hundred twenty-two billion, four hundred two million, forty thousand, twenty".