1020204042 has 64 divisors (see below), whose sum is σ = 2433037824. Its totient is φ = 281096640.

The previous prime is 1020204037. The next prime is 1020204061. The reversal of 1020204042 is 2404020201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48613 + ... + 66359.

It is an arithmetic number, because the mean of its divisors is an integer number (38016216).

Almost surely, 2^1020204042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020204042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216518912).

1020204042 is an abundant number, since it is smaller than the sum of its proper divisors (1412833782).

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

1020204042 is a wasteful number, since it uses less digits than its factorization.

1020204042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843.

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

The square root of 1020204042 is about 31940.6330870257. The cubic root of 1020204042 is about 1006.6898270819.

Adding to 1020204042 its reverse (2404020201), we get a palindrome (3424224243).

The spelling of 1020204042 in words is "one billion, twenty million, two hundred four thousand, forty-two".