42021000420 has 48 divisors (see below), whose sum is σ = 134467202688. Its totient is φ = 9604800000.

The previous prime is 42021000349. The next prime is 42021000431. The reversal of 42021000420 is 2400012024.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42021000420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50024581 + ... + 50025420.

It is an arithmetic number, because the mean of its divisors is an integer number (2801400056).

Almost surely, 2^42021000420 is an apocalyptic number.

It is an amenable number.

42021000420 is an abundant number, since it is smaller than the sum of its proper divisors (92446202268).

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

42021000420 is a wasteful number, since it uses less digits than its factorization.

42021000420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100050020 (or 100050018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 42021000420 its reverse (2400012024), we get a palindrome (44421012444).

The spelling of 42021000420 in words is "forty-two billion, twenty-one million, four hundred twenty", and thus it is an aban number.