21034443342 has 32 divisors (see below), whose sum is σ = 46095537024. Its totient is φ = 6345989600.

The previous prime is 21034443341. The next prime is 21034443359. The reversal of 21034443342 is 24334443012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034443341) 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, 687009 + ... + 716972.

It is an arithmetic number, because the mean of its divisors is an integer number (1440485532).

Almost surely, 2^21034443342 is an apocalyptic number.

21034443342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21034443342 is an abundant number, since it is smaller than the sum of its proper divisors (25061093682).

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

21034443342 is a wasteful number, since it uses less digits than its factorization.

21034443342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404224.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 21034443342 its reverse (24334443012), we get a palindrome (45368886354).

The spelling of 21034443342 in words is "twenty-one billion, thirty-four million, four hundred forty-three thousand, three hundred forty-two".