20881613863 has 8 divisors (see below), whose sum is σ = 22781336976. Its totient is φ = 18982123200.

The previous prime is 20881613839. The next prime is 20881613873. The reversal of 20881613863 is 36831618802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20881613863 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 (20881613813) 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, 167995 + ... + 264547.

It is an arithmetic number, because the mean of its divisors is an integer number (2847667122).

Almost surely, 2^20881613863 is an apocalyptic number.

20881613863 is a deficient number, since it is larger than the sum of its proper divisors (1899723113).

20881613863 is a wasteful number, since it uses less digits than its factorization.

20881613863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116225.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 20881613863 in words is "twenty billion, eight hundred eighty-one million, six hundred thirteen thousand, eight hundred sixty-three".