20780451039364 has 27 divisors (see below), whose sum is σ = 36871955869413. Its totient is φ = 10247565447072.

The previous prime is 20780451039349. The next prime is 20780451039377. The reversal of 20780451039364 is 46393015408702.

It is a happy number.

The square root of 20780451039364 is 4558558.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11795996320900 + 8984454718464 = 3434530^2 + 2997408^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 665533857 + ... + 665565079.

It is a 1-persistent number, because it is pandigital, but 2⋅20780451039364 = 41560902078728 is not.

Almost surely, 2^{20780451039364} is an apocalyptic number.

20780451039364 is the 4558558-th square number.

It is an amenable number.

20780451039364 is a deficient number, since it is larger than the sum of its proper divisors (16091504830049).

20780451039364 is an frugal number, since it uses more digits than its factorization.

20780451039364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62596 (or 31298 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 20780451039364 in words is "twenty trillion, seven hundred eighty billion, four hundred fifty-one million, thirty-nine thousand, three hundred sixty-four".