21719841507 has 96 divisors (see below), whose sum is σ = 41104627200. Its totient is φ = 10731004416.

The previous prime is 21719841503. The next prime is 21719841569. The reversal of 21719841507 is 70514891712.

It is a happy number.

21719841507 is a `hidden beast` number, since 2 + 17 + 1 + 98 + 41 + 507 = 666.

It is not a de Polignac number, because 21719841507 - 2² = 21719841503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21719841503) 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 95 ways as a sum of consecutive naturals, for example, 1377088 + ... + 1392770.

It is an arithmetic number, because the mean of its divisors is an integer number (428173200).

Almost surely, 2^21719841507 is an apocalyptic number.

21719841507 is a deficient number, since it is larger than the sum of its proper divisors (19384785693).

21719841507 is a wasteful number, since it uses less digits than its factorization.

21719841507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15817 (or 15814 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 21719841507 in words is "twenty-one billion, seven hundred nineteen million, eight hundred forty-one thousand, five hundred seven".