21741337812 has 48 divisors (see below), whose sum is σ = 51990527232. Its totient is φ = 7067166720.

The previous prime is 21741337789. The next prime is 21741337823. The reversal of 21741337812 is 21873314712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242468 + ... + 1259844.

It is an arithmetic number, because the mean of its divisors is an integer number (1083135984).

Almost surely, 2^21741337812 is an apocalyptic number.

It is an amenable number.

21741337812 is an abundant number, since it is smaller than the sum of its proper divisors (30249189420).

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

21741337812 is a wasteful number, since it uses less digits than its factorization.

21741337812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19968 (or 19966 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The spelling of 21741337812 in words is "twenty-one billion, seven hundred forty-one million, three hundred thirty-seven thousand, eight hundred twelve".