20452451531089 has 2 divisors, whose sum is σ = 20452451531090. Its totient is φ = 20452451531088.

The previous prime is 20452451531081. The next prime is 20452451531129. The reversal of 20452451531089 is 98013515425402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17088161891089 + 3364289640000 = 4133783^2 + 1834200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20452451531089 - 2³ = 20452451531081 is a prime.

It is not a weakly prime, because it can be changed into another prime (20452451531081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226225765544 + 10226225765545.

It is an arithmetic number, because the mean of its divisors is an integer number (10226225765545).

Almost surely, 2^{20452451531089} is an apocalyptic number.

It is an amenable number.

20452451531089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20452451531089 is an equidigital number, since it uses as much as digits as its factorization.

20452451531089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 20452451531089 in words is "twenty trillion, four hundred fifty-two billion, four hundred fifty-one million, five hundred thirty-one thousand, eighty-nine".