20139504394 has 8 divisors (see below), whose sum is σ = 30225943008. Its totient is φ = 10064190060.

The previous prime is 20139504389. The next prime is 20139504409. The reversal of 20139504394 is 49340593102.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2776542 + ... + 2783785.

It is an arithmetic number, because the mean of its divisors is an integer number (3778242876).

Almost surely, 2^20139504394 is an apocalyptic number.

20139504394 is a deficient number, since it is larger than the sum of its proper divisors (10086438614).

20139504394 is a wasteful number, since it uses less digits than its factorization.

20139504394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562140.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 20139504394 in words is "twenty billion, one hundred thirty-nine million, five hundred four thousand, three hundred ninety-four".