21034004442 has 64 divisors (see below), whose sum is σ = 48579125760. Its totient is φ = 6011006400.

The previous prime is 21034004441. The next prime is 21034004461. The reversal of 21034004442 is 24440043012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21034004441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45484 + ... + 210087.

It is an arithmetic number, because the mean of its divisors is an integer number (759048840).

Almost surely, 2^21034004442 is an apocalyptic number.

21034004442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21034004442 is an abundant number, since it is smaller than the sum of its proper divisors (27545121318).

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

21034004442 is a wasteful number, since it uses less digits than its factorization.

21034004442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255659.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21034004442 its reverse (24440043012), we get a palindrome (45474047454).

The spelling of 21034004442 in words is "twenty-one billion, thirty-four million, four thousand, four hundred forty-two".