20868113764 has 9 divisors (see below), whose sum is σ = 36519704697. Its totient is φ = 10433912424.

The previous prime is 20868113723. The next prime is 20868113767. The reversal of 20868113764 is 46731186802.

It is a happy number.

The square root of 20868113764 is 144458.

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., 2965673764 + 17902440000 = 54458^2 + 133800^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20868113767) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 252802 + ... + 325030.

Almost surely, 2^20868113764 is an apocalyptic number.

20868113764 is the 144458-th square number.

It is an amenable number.

20868113764 is a deficient number, since it is larger than the sum of its proper divisors (15651590933).

20868113764 is an frugal number, since it uses more digits than its factorization.

20868113764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144462 (or 72231 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 20868113764 in words is "twenty billion, eight hundred sixty-eight million, one hundred thirteen thousand, seven hundred sixty-four".