21066562330 has 16 divisors (see below), whose sum is σ = 41367068064. Its totient is φ = 7660568080.

The previous prime is 21066562327. The next prime is 21066562331. The reversal of 21066562330 is 3326566012.

It is not an unprimeable number, because it can be changed into a prime (21066562331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 95756992 + ... + 95757211.

It is an arithmetic number, because the mean of its divisors is an integer number (2585441754).

Almost surely, 2^21066562330 is an apocalyptic number.

21066562330 is a deficient number, since it is larger than the sum of its proper divisors (20300505734).

21066562330 is a wasteful number, since it uses less digits than its factorization.

21066562330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191514221.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 21066562330 in words is "twenty-one billion, sixty-six million, five hundred sixty-two thousand, three hundred thirty".