21783053040 has 160 divisors (see below), whose sum is σ = 79835604480. Its totient is φ = 4807283712.

The previous prime is 21783053009. The next prime is 21783053041. The reversal of 21783053040 is 4035038712.

It is a junction number, because it is equal to n+sod(n) for n = 21783052992 and 21783053010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21783053041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174834 + ... + 272273.

It is an arithmetic number, because the mean of its divisors is an integer number (498972528).

Almost surely, 2^21783053040 is an apocalyptic number.

21783053040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21783053040 is an abundant number, since it is smaller than the sum of its proper divisors (58052551440).

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

21783053040 is a wasteful number, since it uses less digits than its factorization.

21783053040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447159 (or 447153 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 21783053040 in words is "twenty-one billion, seven hundred eighty-three million, fifty-three thousand, forty".