20666002232442 has 32 divisors (see below), whose sum is σ = 47241844041600. Its totient is φ = 5903913627648.

The previous prime is 20666002232413. The next prime is 20666002232497. The reversal of 20666002232442 is 24423220066602.

It is a self number, because there is not a number n which added to its sum of digits gives 20666002232442.

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, 27053767 + ... + 27807162.

It is an arithmetic number, because the mean of its divisors is an integer number (1476307626300).

Almost surely, 2^{20666002232442} is an apocalyptic number.

20666002232442 is an abundant number, since it is smaller than the sum of its proper divisors (26575841809158).

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

20666002232442 is a wasteful number, since it uses less digits than its factorization.

20666002232442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54869910.

The product of its (nonzero) digits is 331776, while the sum is 39.

The spelling of 20666002232442 in words is "twenty trillion, six hundred sixty-six billion, two million, two hundred thirty-two thousand, four hundred forty-two".