20489582477764 has 27 divisors (see below), whose sum is σ = 36317665525197. Its totient is φ = 10114757266848.

The previous prime is 20489582477729. The next prime is 20489582477807. The reversal of 20489582477764 is 46777428598402.

The square root of 20489582477764 is 4526542.

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., 9396419668164 + 11093162809600 = 3065358^2 + 3330640^2 .

It is a super-2 number, since 2×20489582477764² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

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, 715179312 + ... + 715207960.

Almost surely, 2^{20489582477764} is an apocalyptic number.

20489582477764 is the 4526542-nd square number.

It is an amenable number.

20489582477764 is a deficient number, since it is larger than the sum of its proper divisors (15828083047433).

20489582477764 is an frugal number, since it uses more digits than its factorization.

20489582477764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57460 (or 28730 counting only the distinct ones).

The product of its (nonzero) digits is 1517322240, while the sum is 73.

The spelling of 20489582477764 in words is "twenty trillion, four hundred eighty-nine billion, five hundred eighty-two million, four hundred seventy-seven thousand, seven hundred sixty-four".