21470013564650 has 24 divisors (see below), whose sum is σ = 45639114549600. Its totient is φ = 7361147507760.

The previous prime is 21470013564487. The next prime is 21470013564683. The reversal of 21470013564650 is 5646531007412.

It is a super-2 number, since 2×21470013564650² (a number of 27 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 30671447600 + ... + 30671448299.

It is an arithmetic number, because the mean of its divisors is an integer number (1901629772900).

Almost surely, 2^{21470013564650} is an apocalyptic number.

21470013564650 is an abundant number, since it is smaller than the sum of its proper divisors (24169100984950).

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

21470013564650 is a wasteful number, since it uses less digits than its factorization.

21470013564650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61342895918 (or 61342895913 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 21470013564650 in words is "twenty-one trillion, four hundred seventy billion, thirteen million, five hundred sixty-four thousand, six hundred fifty".