20132430397 has 2 divisors, whose sum is σ = 20132430398. Its totient is φ = 20132430396.

The previous prime is 20132430361. The next prime is 20132430407. The reversal of 20132430397 is 79303423102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19464156196 + 668274201 = 139514^2 + 25851^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132430397 - 2¹⁵ = 20132397629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132430497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066215198 + 10066215199.

It is an arithmetic number, because the mean of its divisors is an integer number (10066215199).

Almost surely, 2^20132430397 is an apocalyptic number.

It is an amenable number.

20132430397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132430397 is an equidigital number, since it uses as much as digits as its factorization.

20132430397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

Adding to 20132430397 its reverse (79303423102), we get a palindrome (99435853499).

The spelling of 20132430397 in words is "twenty billion, one hundred thirty-two million, four hundred thirty thousand, three hundred ninety-seven".