21743321204472 has 64 divisors (see below), whose sum is σ = 62142096691200. Its totient is φ = 6210545304960.

The previous prime is 21743321204383. The next prime is 21743321204489. The reversal of 21743321204472 is 27440212334712.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 18513847 + ... + 19653222.

It is an arithmetic number, because the mean of its divisors is an integer number (970970260800).

Almost surely, 2^{21743321204472} is an apocalyptic number.

It is an amenable number.

21743321204472 is an abundant number, since it is smaller than the sum of its proper divisors (40398775486728).

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

21743321204472 is a wasteful number, since it uses less digits than its factorization.

21743321204472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38170476 (or 38170472 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 42.

The spelling of 21743321204472 in words is "twenty-one trillion, seven hundred forty-three billion, three hundred twenty-one million, two hundred four thousand, four hundred seventy-two".