20143579394 has 16 divisors (see below), whose sum is σ = 31339785600. Its totient is φ = 9698817744.

The previous prime is 20143579387. The next prime is 20143579403. The reversal of 20143579394 is 49397534102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436202 + ... + 480165.

It is an arithmetic number, because the mean of its divisors is an integer number (1958736600).

Almost surely, 2^20143579394 is an apocalyptic number.

20143579394 is a deficient number, since it is larger than the sum of its proper divisors (11196206206).

20143579394 is a wasteful number, since it uses less digits than its factorization.

20143579394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916777.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 20143579394 in words is "twenty billion, one hundred forty-three million, five hundred seventy-nine thousand, three hundred ninety-four".