21192946616 has 8 divisors (see below), whose sum is σ = 39736774920. Its totient is φ = 10596473304.

The previous prime is 21192946583. The next prime is 21192946631. The reversal of 21192946616 is 61664929112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324559156 + ... + 1324559171.

It is an arithmetic number, because the mean of its divisors is an integer number (4967096865).

Almost surely, 2^21192946616 is an apocalyptic number.

It is an amenable number.

21192946616 is a deficient number, since it is larger than the sum of its proper divisors (18543828304).

21192946616 is a wasteful number, since it uses less digits than its factorization.

21192946616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649118333 (or 2649118329 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The spelling of 21192946616 in words is "twenty-one billion, one hundred ninety-two million, nine hundred forty-six thousand, six hundred sixteen".