21034143042 has 32 divisors (see below), whose sum is σ = 46347073344. Its totient is φ = 6310872000.

The previous prime is 21034143023. The next prime is 21034143077. The reversal of 21034143042 is 24034143012.

It is a super-2 number, since 2×21034143042² (a number of 21 digits) contains 22 as substring.

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, 1571053 + ... + 1584384.

It is an arithmetic number, because the mean of its divisors is an integer number (1448346042).

Almost surely, 2^21034143042 is an apocalyptic number.

21034143042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21034143042 is an abundant number, since it is smaller than the sum of its proper divisors (25312930302).

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

21034143042 is a wasteful number, since it uses less digits than its factorization.

21034143042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155554.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21034143042 its reverse (24034143012), we get a palindrome (45068286054).

The spelling of 21034143042 in words is "twenty-one billion, thirty-four million, one hundred forty-three thousand, forty-two".