20502234476287 has 4 divisors (see below), whose sum is σ = 21393635975280. Its totient is φ = 19610832977296.

The previous prime is 20502234476239. The next prime is 20502234476309. The reversal of 20502234476287 is 78267443220502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20502234476287 - 2³⁹ = 19952478662399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502204476287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445700749462 + ... + 445700749507.

It is an arithmetic number, because the mean of its divisors is an integer number (5348408993820).

Almost surely, 2^{20502234476287} is an apocalyptic number.

20502234476287 is a deficient number, since it is larger than the sum of its proper divisors (891401498993).

20502234476287 is an equidigital number, since it uses as much as digits as its factorization.

20502234476287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891401498992.

The product of its (nonzero) digits is 9031680, while the sum is 52.

Adding to 20502234476287 its reverse (78267443220502), we get a palindrome (98769677696789).

The spelling of 20502234476287 in words is "twenty trillion, five hundred two billion, two hundred thirty-four million, four hundred seventy-six thousand, two hundred eighty-seven".