20016668337 has 4 divisors (see below), whose sum is σ = 26688891120. Its totient is φ = 13344445556.

The previous prime is 20016668317. The next prime is 20016668363. The reversal of 20016668337 is 73386661002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20016668337 - 2⁷ = 20016668209 is a prime.

It is a super-2 number, since 2×20016668337² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20016668317) 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, 3336111387 + ... + 3336111392.

It is an arithmetic number, because the mean of its divisors is an integer number (6672222780).

Almost surely, 2^20016668337 is an apocalyptic number.

It is an amenable number.

20016668337 is a deficient number, since it is larger than the sum of its proper divisors (6672222783).

20016668337 is an equidigital number, since it uses as much as digits as its factorization.

20016668337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672222782.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 20016668337 in words is "twenty billion, sixteen million, six hundred sixty-eight thousand, three hundred thirty-seven".