20940801036544 has 81 divisors (see below), whose sum is σ = 44118511455333. Its totient is φ = 9918667846656.

The previous prime is 20940801036517. The next prime is 20940801036553. The reversal of 20940801036544 is 44563010804902.

The square root of 20940801036544 is 4576112.

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., 20010949689600 + 929851346944 = 4473360^2 + 964288^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20940801036494 and 20940801036503.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1391130522 + ... + 1391145574.

Almost surely, 2^{20940801036544} is an apocalyptic number.

20940801036544 is the 4576112-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20940801036544

20940801036544 is an abundant number, since it is smaller than the sum of its proper divisors (23177710418789).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20940801036544 is an frugal number, since it uses more digits than its factorization.

20940801036544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30160 (or 15074 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 20940801036544 in words is "twenty trillion, nine hundred forty billion, eight hundred one million, thirty-six thousand, five hundred forty-four".