20066758331 has 4 divisors (see below), whose sum is σ = 20068710672. Its totient is φ = 20064805992.

The previous prime is 20066758277. The next prime is 20066758339. The reversal of 20066758331 is 13385766002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20066758331 - 2¹⁸ = 20066496187 is a prime.

It is a super-2 number, since 2×20066758331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066758339) 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, 960671 + ... + 981336.

It is an arithmetic number, because the mean of its divisors is an integer number (5017177668).

Almost surely, 2^20066758331 is an apocalyptic number.

20066758331 is a deficient number, since it is larger than the sum of its proper divisors (1952341).

20066758331 is a wasteful number, since it uses less digits than its factorization.

20066758331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952340.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20066758331 in words is "twenty billion, sixty-six million, seven hundred fifty-eight thousand, three hundred thirty-one".