20194894476863 has 8 divisors (see below), whose sum is σ = 20580116545680. Its totient is φ = 19811419447680.

The previous prime is 20194894476853. The next prime is 20194894476871. The reversal of 20194894476863 is 36867449849102.

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-20194894476863 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 (20194894476803) 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, 436736570 + ... + 436782807.

It is an arithmetic number, because the mean of its divisors is an integer number (2572514568210).

Almost surely, 2^{20194894476863} is an apocalyptic number.

20194894476863 is a deficient number, since it is larger than the sum of its proper divisors (385222068817).

20194894476863 is an equidigital number, since it uses as much as digits as its factorization.

20194894476863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873519817.

The product of its (nonzero) digits is 501645312, while the sum is 71.

The spelling of 20194894476863 in words is "twenty trillion, one hundred ninety-four billion, eight hundred ninety-four million, four hundred seventy-six thousand, eight hundred sixty-three".