21483476640 has 192 divisors, whose sum is σ = 79615509120. Its totient is φ = 5391912960.

The previous prime is 21483476603. The next prime is 21483476659. The reversal of 21483476640 is 4667438412.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72826 + ... + 219705.

It is an arithmetic number, because the mean of its divisors is an integer number (414664110).

Almost surely, 2^21483476640 is an apocalyptic number.

21483476640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21483476640 is an abundant number, since it is smaller than the sum of its proper divisors (58132032480).

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

21483476640 is a wasteful number, since it uses less digits than its factorization.

21483476640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292572 (or 292558 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 21483476640 in words is "twenty-one billion, four hundred eighty-three million, four hundred seventy-six thousand, six hundred forty".