20666419433 has 8 divisors (see below), whose sum is σ = 22575537216. Its totient is φ = 18762360400.

The previous prime is 20666419391. The next prime is 20666419441. The reversal of 20666419433 is 33491466602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20666419433 - 2¹² = 20666415337 is a prime.

It is a super-3 number, since 3×20666419433³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20666419933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256138 + ... + 1272483.

It is an arithmetic number, because the mean of its divisors is an integer number (2821942152).

Almost surely, 2^20666419433 is an apocalyptic number.

It is an amenable number.

20666419433 is a deficient number, since it is larger than the sum of its proper divisors (1909117783).

20666419433 is a wasteful number, since it uses less digits than its factorization.

20666419433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529375.

The product of its (nonzero) digits is 559872, while the sum is 44.

The spelling of 20666419433 in words is "twenty billion, six hundred sixty-six million, four hundred nineteen thousand, four hundred thirty-three".