21803151783 has 16 divisors (see below), whose sum is σ = 34668366336. Its totient is φ = 11917250400.

The previous prime is 21803151701. The next prime is 21803151857. The reversal of 21803151783 is 38715130812.

It is not a de Polignac number, because 21803151783 - 2¹² = 21803147687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21803151583) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22570068 + ... + 22571033.

It is an arithmetic number, because the mean of its divisors is an integer number (2166772896).

Almost surely, 2^21803151783 is an apocalyptic number.

21803151783 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21803151783 is a deficient number, since it is larger than the sum of its proper divisors (12865214553).

21803151783 is a wasteful number, since it uses less digits than its factorization.

21803151783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45141134.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 21803151783 in words is "twenty-one billion, eight hundred three million, one hundred fifty-one thousand, seven hundred eighty-three".