20894183694 has 24 divisors (see below), whose sum is σ = 45277628760. Its totient is φ = 6963666768.

The previous prime is 20894183683. The next prime is 20894183767. The reversal of 20894183694 is 49638149802.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20894183694.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 37872 + ... + 207900.

It is an arithmetic number, because the mean of its divisors is an integer number (1886567865).

Almost surely, 2^20894183694 is an apocalyptic number.

20894183694 is an abundant number, since it is smaller than the sum of its proper divisors (24383445066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20894183694 is a wasteful number, since it uses less digits than its factorization.

20894183694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176864 (or 176861 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 20894183694 in words is "twenty billion, eight hundred ninety-four million, one hundred eighty-three thousand, six hundred ninety-four".