20132340521 has 2 divisors, whose sum is σ = 20132340522. Its totient is φ = 20132340520.

The previous prime is 20132340517. The next prime is 20132340539. The reversal of 20132340521 is 12504323102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17201634025 + 2930706496 = 131155^2 + 54136^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132340521 - 2² = 20132340517 is a prime.

It is a super-2 number, since 2×20132340521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20132340721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066170260 + 10066170261.

It is an arithmetic number, because the mean of its divisors is an integer number (10066170261).

Almost surely, 2^20132340521 is an apocalyptic number.

It is an amenable number.

20132340521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132340521 is an equidigital number, since it uses as much as digits as its factorization.

20132340521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20132340521 its reverse (12504323102), we get a palindrome (32636663623).

The spelling of 20132340521 in words is "twenty billion, one hundred thirty-two million, three hundred forty thousand, five hundred twenty-one".