21983242337040 has 80 divisors (see below), whose sum is σ = 68471027948736. Its totient is φ = 5834415014400.

The previous prime is 21983242337033. The next prime is 21983242337087. The reversal of 21983242337040 is 4073324238912.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 217003491 + ... + 217104770.

Almost surely, 2^{21983242337040} is an apocalyptic number.

21983242337040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21983242337040 is an abundant number, since it is smaller than the sum of its proper divisors (46487785611696).

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

21983242337040 is a wasteful number, since it uses less digits than its factorization.

21983242337040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434108488 (or 434108482 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 21983242337040 in words is "twenty-one trillion, nine hundred eighty-three billion, two hundred forty-two million, three hundred thirty-seven thousand, forty".