21437442747604 has 48 divisors (see below), whose sum is σ = 40629373076880. Its totient is φ = 9838499374080.

The previous prime is 21437442747599. The next prime is 21437442747613. The reversal of 21437442747604 is 40674724473412.

It can be written as a sum of positive squares in 8 ways, for example, as 12135259944900 + 9302182802704 = 3483570^2 + 3049948^2 .

It is a congruent number.

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, 5816962 + ... + 8758534.

It is an arithmetic number, because the mean of its divisors is an integer number (846445272435).

Almost surely, 2^{21437442747604} is an apocalyptic number.

It is an amenable number.

21437442747604 is a deficient number, since it is larger than the sum of its proper divisors (19191930329276).

21437442747604 is a wasteful number, since it uses less digits than its factorization.

21437442747604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942380 (or 2942378 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 55.

The spelling of 21437442747604 in words is "twenty-one trillion, four hundred thirty-seven billion, four hundred forty-two million, seven hundred forty-seven thousand, six hundred four".