20402214211 has 4 divisors (see below), whose sum is σ = 20407042800. Its totient is φ = 20397385624.

The previous prime is 20402214197. The next prime is 20402214229. The reversal of 20402214211 is 11241220402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11241220402 = 2 ⋅5620610201.

It is a cyclic number.

It is not a de Polignac number, because 20402214211 - 2¹¹ = 20402212163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20402284211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407951 + ... + 2416408.

It is an arithmetic number, because the mean of its divisors is an integer number (5101760700).

Almost surely, 2^20402214211 is an apocalyptic number.

20402214211 is a deficient number, since it is larger than the sum of its proper divisors (4828589).

20402214211 is an equidigital number, since it uses as much as digits as its factorization.

20402214211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828588.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20402214211 its reverse (11241220402), we get a palindrome (31643434613).

The spelling of 20402214211 in words is "twenty billion, four hundred two million, two hundred fourteen thousand, two hundred eleven".