20066634433 has 4 divisors (see below), whose sum is σ = 20077158960. Its totient is φ = 20056109908.

The previous prime is 20066634421. The next prime is 20066634439. The reversal of 20066634433 is 33443666002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33443666002 = 2 ⋅16721833001.

It is a cyclic number.

It is not a de Polignac number, because 20066634433 - 2⁹ = 20066633921 is a prime.

It is a super-2 number, since 2×20066634433² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20066634392 and 20066634401.

It is not an unprimeable number, because it can be changed into a prime (20066634439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5259403 + ... + 5263216.

It is an arithmetic number, because the mean of its divisors is an integer number (5019289740).

Almost surely, 2^20066634433 is an apocalyptic number.

It is an amenable number.

20066634433 is a deficient number, since it is larger than the sum of its proper divisors (10524527).

20066634433 is a wasteful number, since it uses less digits than its factorization.

20066634433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10524526.

The product of its (nonzero) digits is 186624, while the sum is 37.

The spelling of 20066634433 in words is "twenty billion, sixty-six million, six hundred thirty-four thousand, four hundred thirty-three".