20502453513 has 8 divisors (see below), whose sum is σ = 27404777376. Its totient is φ = 13634216000.

The previous prime is 20502453479. The next prime is 20502453533. The reversal of 20502453513 is 31535420502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20502453513 - 2¹² = 20502449417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20502453533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8520183 + ... + 8522588.

It is an arithmetic number, because the mean of its divisors is an integer number (3425597172).

Almost surely, 2^20502453513 is an apocalyptic number.

It is an amenable number.

20502453513 is a deficient number, since it is larger than the sum of its proper divisors (6902323863).

20502453513 is a wasteful number, since it uses less digits than its factorization.

20502453513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17043175.

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 20502453513 in words is "twenty billion, five hundred two million, four hundred fifty-three thousand, five hundred thirteen".