20340221011 has 16 divisors (see below), whose sum is σ = 22803711840. Its totient is φ = 17979770880.

The previous prime is 20340221009. The next prime is 20340221023. The reversal of 20340221011 is 11012204302.

It is a cyclic number.

It is not a de Polignac number, because 20340221011 - 2¹ = 20340221009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340225011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650995 + ... + 681523.

It is an arithmetic number, because the mean of its divisors is an integer number (1425231990).

Almost surely, 2^20340221011 is an apocalyptic number.

20340221011 is a deficient number, since it is larger than the sum of its proper divisors (2463490829).

20340221011 is a wasteful number, since it uses less digits than its factorization.

20340221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32214.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20340221011 its reverse (11012204302), we get a palindrome (31352425313).

The spelling of 20340221011 in words is "twenty billion, three hundred forty million, two hundred twenty-one thousand, eleven".