20404213042 has 8 divisors (see below), whose sum is σ = 32406691356. Its totient is φ = 9601982592.

The previous prime is 20404213019. The next prime is 20404213061. The reversal of 20404213042 is 24031240402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19479505761 + 924707281 = 139569^2 + 30409^2 .

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, 300061923 + ... + 300061990.

Almost surely, 2^20404213042 is an apocalyptic number.

20404213042 is a deficient number, since it is larger than the sum of its proper divisors (12002478314).

20404213042 is a wasteful number, since it uses less digits than its factorization.

20404213042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600123932.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20404213042 its reverse (24031240402), we get a palindrome (44435453444).

The spelling of 20404213042 in words is "twenty billion, four hundred four million, two hundred thirteen thousand, forty-two".