21783887496 has 256 divisors, whose sum is σ = 70922649600. Its totient is φ = 6066047232.

The previous prime is 21783887413. The next prime is 21783887501. The reversal of 21783887496 is 69478838712.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22526805 + ... + 22527771.

It is an arithmetic number, because the mean of its divisors is an integer number (277041600).

Almost surely, 2^21783887496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21783887496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35461324800).

21783887496 is an abundant number, since it is smaller than the sum of its proper divisors (49138762104).

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

21783887496 is a wasteful number, since it uses less digits than its factorization.

21783887496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1343 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 21783887496 in words is "twenty-one billion, seven hundred eighty-three million, eight hundred eighty-seven thousand, four hundred ninety-six".