20432040332545 has 16 divisors (see below), whose sum is σ = 25182150246288. Its totient is φ = 15903200897280.

The previous prime is 20432040332491. The next prime is 20432040332569. The reversal of 20432040332545 is 54523304023402.

It can be written as a sum of positive squares in 8 ways, for example, as 3283695537409 + 17148344795136 = 1812097^2 + 4141056^2 .

It is not a de Polignac number, because 20432040332545 - 2²¹ = 20432038235393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

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, 2227735 + ... + 6769555.

It is an arithmetic number, because the mean of its divisors is an integer number (1573884390393).

Almost surely, 2^{20432040332545} is an apocalyptic number.

It is an amenable number.

20432040332545 is a deficient number, since it is larger than the sum of its proper divisors (4750109913743).

20432040332545 is a wasteful number, since it uses less digits than its factorization.

20432040332545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566180.

The product of its (nonzero) digits is 345600, while the sum is 37.

Adding to 20432040332545 its reverse (54523304023402), we get a palindrome (74955344355947).

The spelling of 20432040332545 in words is "twenty trillion, four hundred thirty-two billion, forty million, three hundred thirty-two thousand, five hundred forty-five".