20020400042394 has 16 divisors (see below), whose sum is σ = 40041146629440. Its totient is φ = 6673408923360.

The previous prime is 20020400042381. The next prime is 20020400042491. The reversal of 20020400042394 is 49324000402002.

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, 13685302 + ... + 15077409.

It is an arithmetic number, because the mean of its divisors is an integer number (2502571664340).

Almost surely, 2^{20020400042394} is an apocalyptic number.

20020400042394 is an abundant number, since it is smaller than the sum of its proper divisors (20020746587046).

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

20020400042394 is a wasteful number, since it uses less digits than its factorization.

20020400042394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28878725.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 20020400042394 its reverse (49324000402002), we get a palindrome (69344400444396).

The spelling of 20020400042394 in words is "twenty trillion, twenty billion, four hundred million, forty-two thousand, three hundred ninety-four".