20007863863 has 12 divisors (see below), whose sum is σ = 21698217768. Its totient is φ = 18440753760.

The previous prime is 20007863861. The next prime is 20007863879. The reversal of 20007863863 is 36836870002.

It is not a de Polignac number, because 20007863863 - 2¹ = 20007863861 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 (20007863861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22156 + ... + 201262.

It is an arithmetic number, because the mean of its divisors is an integer number (1808184814).

Almost surely, 2^20007863863 is an apocalyptic number.

20007863863 is a deficient number, since it is larger than the sum of its proper divisors (1690353905).

20007863863 is a wasteful number, since it uses less digits than its factorization.

20007863863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179794 (or 179781 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 20007863863 in words is "twenty billion, seven million, eight hundred sixty-three thousand, eight hundred sixty-three".