21220064462630 has 16 divisors (see below), whose sum is σ = 41668490217744. Its totient is φ = 7716387077280.

The previous prime is 21220064462587. The next prime is 21220064462669. The reversal of 21220064462630 is 3626446002212.

It is a super-2 number, since 2×21220064462630² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96454838357 + ... + 96454838576.

It is an arithmetic number, because the mean of its divisors is an integer number (2604280638609).

Almost surely, 2^{21220064462630} is an apocalyptic number.

21220064462630 is a deficient number, since it is larger than the sum of its proper divisors (20448425755114).

21220064462630 is a wasteful number, since it uses less digits than its factorization.

21220064462630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192909676951.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 21220064462630 in words is "twenty-one trillion, two hundred twenty billion, sixty-four million, four hundred sixty-two thousand, six hundred thirty".