20439332496145 has 16 divisors (see below), whose sum is σ = 24909235350480. Its totient is φ = 16098352129024.

The previous prime is 20439332496127. The next prime is 20439332496169. The reversal of 20439332496145 is 54169423393402.

It is a Cunningham number, because it is equal to 4520988²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 7480246880016 + 12959085616129 = 2735004^2 + 3599873^2 .

It is a cyclic number.

It is not a de Polignac number, because 20439332496145 - 2¹⁷ = 20439332365073 is a prime.

It is a super-2 number, since 2×20439332496145² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98460874 + ... + 98668243.

It is an arithmetic number, because the mean of its divisors is an integer number (1556827209405).

Almost surely, 2^{20439332496145} is an apocalyptic number.

It is an amenable number.

20439332496145 is a deficient number, since it is larger than the sum of its proper divisors (4469902854335).

20439332496145 is a wasteful number, since it uses less digits than its factorization.

20439332496145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197129444.

The product of its (nonzero) digits is 16796160, while the sum is 55.

The spelling of 20439332496145 in words is "twenty trillion, four hundred thirty-nine billion, three hundred thirty-two million, four hundred ninety-six thousand, one hundred forty-five".