20016157211 has 4 divisors (see below), whose sum is σ = 20042599392. Its totient is φ = 19989715032.

The previous prime is 20016157207. The next prime is 20016157279. The reversal of 20016157211 is 11275161002.

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 20016157211 - 2² = 20016157207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20016157201) 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, 13219955 + ... + 13221468.

It is an arithmetic number, because the mean of its divisors is an integer number (5010649848).

Almost surely, 2^20016157211 is an apocalyptic number.

20016157211 is a deficient number, since it is larger than the sum of its proper divisors (26442181).

20016157211 is an equidigital number, since it uses as much as digits as its factorization.

20016157211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26442180.

The product of its (nonzero) digits is 840, while the sum is 26.

The spelling of 20016157211 in words is "twenty billion, sixteen million, one hundred fifty-seven thousand, two hundred eleven".