21344342404 has 36 divisors (see below), whose sum is σ = 46922280832. Its totient is φ = 8315976240.

The previous prime is 21344342389. The next prime is 21344342419. The reversal of 21344342404 is 40424344312.

It is an interprime number because it is at equal distance from previous prime (21344342389) and next prime (21344342419).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3146604 + ... + 3153379.

Almost surely, 2^21344342404 is an apocalyptic number.

It is an amenable number.

21344342404 is an abundant number, since it is smaller than the sum of its proper divisors (25577938428).

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

21344342404 is a wasteful number, since it uses less digits than its factorization.

21344342404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300016 (or 6300003 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21344342404 its reverse (40424344312), we get a palindrome (61768686716).

The spelling of 21344342404 in words is "twenty-one billion, three hundred forty-four million, three hundred forty-two thousand, four hundred four".