20607463809 has 27 divisors (see below), whose sum is σ = 30110516163. Its totient is φ = 13581262224.

The previous prime is 20607463787. The next prime is 20607463817. The reversal of 20607463809 is 90836470602.

The square root of 20607463809 is 143553.

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

20607463809 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 7 + 4 + 638 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14363303409 + 6244160400 = 119847^2 + 79020^2 .

It is not a de Polignac number, because 20607463809 - 2⁹ = 20607463297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20607463889) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 46941612 + ... + 46942050.

Almost surely, 2^20607463809 is an apocalyptic number.

20607463809 is the 143553-rd square number.

20607463809 is the 71777-th centered octagonal number.

It is an amenable number.

20607463809 is a deficient number, since it is larger than the sum of its proper divisors (9503052354).

20607463809 is an frugal number, since it uses more digits than its factorization.

20607463809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

It can be divided in two parts, 20607 and 463809, that added together give a square (484416 = 696²).

The spelling of 20607463809 in words is "twenty billion, six hundred seven million, four hundred sixty-three thousand, eight hundred nine".