21942115508 has 48 divisors (see below), whose sum is σ = 39725790720. Its totient is φ = 10597910400.

The previous prime is 21942115493. The next prime is 21942115519. The reversal of 21942115508 is 80551124912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18578678 + ... + 18579858.

It is an arithmetic number, because the mean of its divisors is an integer number (827620640).

Almost surely, 2^21942115508 is an apocalyptic number.

It is an amenable number.

21942115508 is a deficient number, since it is larger than the sum of its proper divisors (17783675212).

21942115508 is a wasteful number, since it uses less digits than its factorization.

21942115508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328 (or 2326 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The spelling of 21942115508 in words is "twenty-one billion, nine hundred forty-two million, one hundred fifteen thousand, five hundred eight".