21819240603 has 24 divisors (see below), whose sum is σ = 32617681200. Its totient is φ = 14038444224.

The previous prime is 21819240593. The next prime is 21819240637. The reversal of 21819240603 is 30604291812.

21819240603 is a `hidden beast` number, since 2 + 1 + 8 + 1 + 9 + 2 + 40 + 603 = 666.

It is not a de Polignac number, because 21819240603 - 2¹² = 21819236507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21819240673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 624801 + ... + 658797.

It is an arithmetic number, because the mean of its divisors is an integer number (1359070050).

Almost surely, 2^21819240603 is an apocalyptic number.

21819240603 is a deficient number, since it is larger than the sum of its proper divisors (10798440597).

21819240603 is a wasteful number, since it uses less digits than its factorization.

21819240603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491 (or 36488 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 21819240603 in words is "twenty-one billion, eight hundred nineteen million, two hundred forty thousand, six hundred three".