20368499487 has 24 divisors (see below), whose sum is σ = 31598679600. Its totient is φ = 11636666496.

The previous prime is 20368499423. The next prime is 20368499509. The reversal of 20368499487 is 78499486302.

It is not a de Polignac number, because 20368499487 - 2⁶ = 20368499423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20368499487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368499407) 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 23 ways as a sum of consecutive naturals, for example, 850939 + ... + 874547.

It is an arithmetic number, because the mean of its divisors is an integer number (1316611650).

Almost surely, 2^20368499487 is an apocalyptic number.

20368499487 is a deficient number, since it is larger than the sum of its proper divisors (11230180113).

20368499487 is a wasteful number, since it uses less digits than its factorization.

20368499487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29495 (or 29488 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 20368499487 in words is "twenty billion, three hundred sixty-eight million, four hundred ninety-nine thousand, four hundred eighty-seven".