20740444552015 has 16 divisors (see below), whose sum is σ = 24922407669120. Its totient is φ = 16569774144000.

The previous prime is 20740444552013. The next prime is 20740444552021. The reversal of 20740444552015 is 51025544404702.

It is not a de Polignac number, because 20740444552015 - 2¹ = 20740444552013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740444552013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181448301 + ... + 181562569.

It is an arithmetic number, because the mean of its divisors is an integer number (1557650479320).

Almost surely, 2^{20740444552015} is an apocalyptic number.

20740444552015 is a deficient number, since it is larger than the sum of its proper divisors (4181963117105).

20740444552015 is a wasteful number, since it uses less digits than its factorization.

20740444552015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163362.

The product of its (nonzero) digits is 896000, while the sum is 43.

Adding to 20740444552015 its reverse (51025544404702), we get a palindrome (71765988956717).

The spelling of 20740444552015 in words is "twenty trillion, seven hundred forty billion, four hundred forty-four million, five hundred fifty-two thousand, fifteen".