20131019994 has 8 divisors (see below), whose sum is σ = 40262040000. Its totient is φ = 6710339996.

The previous prime is 20131019957. The next prime is 20131020001. The reversal of 20131019994 is 49991013102.

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

20131019994 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677584994 + ... + 1677585005.

It is an arithmetic number, because the mean of its divisors is an integer number (5032755000).

Almost surely, 2^20131019994 is an apocalyptic number.

20131019994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20131019994 is a wasteful number, since it uses less digits than its factorization.

20131019994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355170004.

The product of its (nonzero) digits is 17496, while the sum is 39.

The spelling of 20131019994 in words is "twenty billion, one hundred thirty-one million, nineteen thousand, nine hundred ninety-four".