20132121320 has 32 divisors (see below), whose sum is σ = 46859250600. Its totient is φ = 7775163648.

The previous prime is 20132121271. The next prime is 20132121323. The reversal of 20132121320 is 2312123102.

It can be written as a sum of positive squares in 4 ways, for example, as 18948623716 + 1183497604 = 137654^2 + 34402^2 .

It is not an unprimeable number, because it can be changed into a prime (20132121323) 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, 8676479 + ... + 8678798.

Almost surely, 2^20132121320 is an apocalyptic number.

20132121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20132121320 is an abundant number, since it is smaller than the sum of its proper divisors (26727129280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20132121320 is a wasteful number, since it uses less digits than its factorization.

20132121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17355317 (or 17355313 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20132121320 its reverse (2312123102), we get a palindrome (22444244422).

The spelling of 20132121320 in words is "twenty billion, one hundred thirty-two million, one hundred twenty-one thousand, three hundred twenty".