21876087508 has 12 divisors (see below), whose sum is σ = 41763439872. Its totient is φ = 9943676120.

The previous prime is 21876087449. The next prime is 21876087511. The reversal of 21876087508 is 80578067812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 248591860 + ... + 248591947.

It is an arithmetic number, because the mean of its divisors is an integer number (3480286656).

Almost surely, 2^21876087508 is an apocalyptic number.

It is an amenable number.

21876087508 is a deficient number, since it is larger than the sum of its proper divisors (19887352364).

21876087508 is a wasteful number, since it uses less digits than its factorization.

21876087508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497183822 (or 497183820 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 21876087508 in words is "twenty-one billion, eight hundred seventy-six million, eighty-seven thousand, five hundred eight".