21652431643066 has 32 divisors (see below), whose sum is σ = 38122101527040. Its totient is φ = 9028707607296.

The previous prime is 21652431643009. The next prime is 21652431643091. The reversal of 21652431643066 is 66034613425612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57038946 + ... + 57417298.

It is an arithmetic number, because the mean of its divisors is an integer number (1191315672720).

Almost surely, 2^{21652431643066} is an apocalyptic number.

21652431643066 is a deficient number, since it is larger than the sum of its proper divisors (16469669883974).

21652431643066 is a wasteful number, since it uses less digits than its factorization.

21652431643066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488878.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 21652431643066 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred thirty-one million, six hundred forty-three thousand, sixty-six".