20607510247 has 4 divisors (see below), whose sum is σ = 20712117096. Its totient is φ = 20502903400.

The previous prime is 20607510221. The next prime is 20607510289. The reversal of 20607510247 is 74201570602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20607510247 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 (20607510647) 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 3 ways as a sum of consecutive naturals, for example, 52303129 + ... + 52303522.

It is an arithmetic number, because the mean of its divisors is an integer number (5178029274).

Almost surely, 2^20607510247 is an apocalyptic number.

20607510247 is a deficient number, since it is larger than the sum of its proper divisors (104606849).

20607510247 is a wasteful number, since it uses less digits than its factorization.

20607510247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104606848.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 20607510247 in words is "twenty billion, six hundred seven million, five hundred ten thousand, two hundred forty-seven".