20264102603521 has 16 divisors (see below), whose sum is σ = 23596138252800. Its totient is φ = 17041363530048.

The previous prime is 20264102603513. The next prime is 20264102603533. The reversal of 20264102603521 is 12530620146202.

It is a cyclic number.

It is not a de Polignac number, because 20264102603521 - 2³ = 20264102603513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20264102603501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83394120 + ... + 83636758.

It is an arithmetic number, because the mean of its divisors is an integer number (1474758640800).

Almost surely, 2^{20264102603521} is an apocalyptic number.

It is an amenable number.

20264102603521 is a deficient number, since it is larger than the sum of its proper divisors (3332035649279).

20264102603521 is a wasteful number, since it uses less digits than its factorization.

20264102603521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467808.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20264102603521 its reverse (12530620146202), we get a palindrome (32794722749723).

The spelling of 20264102603521 in words is "twenty trillion, two hundred sixty-four billion, one hundred two million, six hundred three thousand, five hundred twenty-one".