21165270152 has 32 divisors (see below), whose sum is σ = 43020626880. Its totient is φ = 9703886400.

The previous prime is 21165270149. The next prime is 21165270167. The reversal of 21165270152 is 25107256112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658178 + ... + 689585.

It is an arithmetic number, because the mean of its divisors is an integer number (1344394590).

Almost surely, 2^21165270152 is an apocalyptic number.

It is an amenable number.

21165270152 is an abundant number, since it is smaller than the sum of its proper divisors (21855356728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21165270152 is a wasteful number, since it uses less digits than its factorization.

21165270152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347933 (or 1347929 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 21165270152 in words is "twenty-one billion, one hundred sixty-five million, two hundred seventy thousand, one hundred fifty-two".