20344340121 has 32 divisors (see below), whose sum is σ = 32584992768. Its totient is φ = 11038684800.

The previous prime is 20344340119. The next prime is 20344340141. The reversal of 20344340121 is 12104344302.

It is not a de Polignac number, because 20344340121 - 2¹ = 20344340119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20344340091 and 20344340100.

It is not an unprimeable number, because it can be changed into a prime (20344340111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87555 + ... + 219896.

It is an arithmetic number, because the mean of its divisors is an integer number (1018281024).

Almost surely, 2^20344340121 is an apocalyptic number.

20344340121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20344340121 is a deficient number, since it is larger than the sum of its proper divisors (12240652647).

20344340121 is a wasteful number, since it uses less digits than its factorization.

20344340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307621.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20344340121 its reverse (12104344302), we get a palindrome (32448684423).

The spelling of 20344340121 in words is "twenty billion, three hundred forty-four million, three hundred forty thousand, one hundred twenty-one".