21732380783 has 18 divisors (see below), whose sum is σ = 23112503592. Its totient is φ = 20395941280.

The previous prime is 21732380773. The next prime is 21732380827. The reversal of 21732380783 is 38708323712.

It is a happy number.

It is not a de Polignac number, because 21732380783 - 2¹⁶ = 21732315247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21732380723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41712563 + ... + 41713083.

Almost surely, 2^21732380783 is an apocalyptic number.

21732380783 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21732380783 is a deficient number, since it is larger than the sum of its proper divisors (1380122809).

21732380783 is an frugal number, since it uses more digits than its factorization.

21732380783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 21732380783 in words is "twenty-one billion, seven hundred thirty-two million, three hundred eighty thousand, seven hundred eighty-three".