20213687021667 has 8 divisors (see below), whose sum is σ = 26951995773696. Its totient is φ = 13475584808712.

The previous prime is 20213687021651. The next prime is 20213687021711. The reversal of 20213687021667 is 76612078631202.

It is a happy number.

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

It is not a de Polignac number, because 20213687021667 - 2⁴ = 20213687021651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20213687021167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51406263 + ... + 51797984.

It is an arithmetic number, because the mean of its divisors is an integer number (3368999471712).

Almost surely, 2^{20213687021667} is an apocalyptic number.

20213687021667 is a deficient number, since it is larger than the sum of its proper divisors (6738308752029).

20213687021667 is a wasteful number, since it uses less digits than its factorization.

20213687021667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103269537.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 20213687021667 in words is "twenty trillion, two hundred thirteen billion, six hundred eighty-seven million, twenty-one thousand, six hundred sixty-seven".