20523797418650 has 12 divisors (see below), whose sum is σ = 38174263198782. Its totient is φ = 8209518967440.

The previous prime is 20523797418611. The next prime is 20523797418659. The reversal of 20523797418650 is 5681479732502.

It can be written as a sum of positive squares in 3 ways, for example, as 16845368784721 + 3678428633929 = 4104311^2 + 1917923^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20523797418650.

It is not an unprimeable number, because it can be changed into a prime (20523797418659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205237974137 + ... + 205237974236.

It is a 1-persistent number, because it is pandigital, but 2⋅20523797418650 = 41047594837300 is not.

Almost surely, 2^{20523797418650} is an apocalyptic number.

20523797418650 is a deficient number, since it is larger than the sum of its proper divisors (17650465780132).

20523797418650 is a wasteful number, since it uses less digits than its factorization.

20523797418650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410475948385 (or 410475948380 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 20523797418650 in words is "twenty trillion, five hundred twenty-three billion, seven hundred ninety-seven million, four hundred eighteen thousand, six hundred fifty".