20513041487 has 8 divisors (see below), whose sum is σ = 21675863040. Its totient is φ = 19372799160.

The previous prime is 20513041481. The next prime is 20513041541. The reversal of 20513041487 is 78414031502.

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 20513041487 - 2¹⁴ = 20513025103 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 (20513041481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5642939 + ... + 5646572.

It is an arithmetic number, because the mean of its divisors is an integer number (2709482880).

Almost surely, 2^20513041487 is an apocalyptic number.

20513041487 is a deficient number, since it is larger than the sum of its proper divisors (1162821553).

20513041487 is a wasteful number, since it uses less digits than its factorization.

20513041487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11289613.

The product of its (nonzero) digits is 26880, while the sum is 35.

Adding to 20513041487 its reverse (78414031502), we get a palindrome (98927072989).

The spelling of 20513041487 in words is "twenty billion, five hundred thirteen million, forty-one thousand, four hundred eighty-seven".