210420043442 has 32 divisors (see below), whose sum is σ = 363166460928. Its totient is φ = 89570483136.

The previous prime is 210420043441. The next prime is 210420043453. The reversal of 210420043442 is 244340024012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (210420043441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143743 + ... + 1314909.

It is an arithmetic number, because the mean of its divisors is an integer number (11348951904).

Almost surely, 2^210420043442 is an apocalyptic number.

210420043442 is a deficient number, since it is larger than the sum of its proper divisors (152746417486).

210420043442 is a wasteful number, since it uses less digits than its factorization.

210420043442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171770.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 210420043442 its reverse (244340024012), we get a palindrome (454760067454).

The spelling of 210420043442 in words is "two hundred ten billion, four hundred twenty million, forty-three thousand, four hundred forty-two".