20863986590 has 8 divisors (see below), whose sum is σ = 37555175880. Its totient is φ = 8345594632.

The previous prime is 20863986581. The next prime is 20863986599. The reversal of 20863986590 is 9568936802.

It is an interprime number because it is at equal distance from previous prime (20863986581) and next prime (20863986599).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863986599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043199320 + ... + 1043199339.

It is an arithmetic number, because the mean of its divisors is an integer number (4694396985).

Almost surely, 2^20863986590 is an apocalyptic number.

20863986590 is a deficient number, since it is larger than the sum of its proper divisors (16691189290).

20863986590 is a wasteful number, since it uses less digits than its factorization.

20863986590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086398666.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 20863986590 in words is "twenty billion, eight hundred sixty-three million, nine hundred eighty-six thousand, five hundred ninety".