21302404442 has 8 divisors (see below), whose sum is σ = 34858480032. Its totient is φ = 9682911100.

The previous prime is 21302404433. The next prime is 21302404463. The reversal of 21302404442 is 24440420312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484145534 + ... + 484145577.

It is an arithmetic number, because the mean of its divisors is an integer number (4357310004).

Almost surely, 2^21302404442 is an apocalyptic number.

21302404442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21302404442 is a deficient number, since it is larger than the sum of its proper divisors (13556075590).

21302404442 is a wasteful number, since it uses less digits than its factorization.

21302404442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968291124.

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

Adding to 21302404442 its reverse (24440420312), we get a palindrome (45742824754).

The spelling of 21302404442 in words is "twenty-one billion, three hundred two million, four hundred four thousand, four hundred forty-two".