20213421042 has 8 divisors (see below), whose sum is σ = 40426842096. Its totient is φ = 6737807012.

The previous prime is 20213420999. The next prime is 20213421061. The reversal of 20213421042 is 24012431202.

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

20213421042 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684451748 + ... + 1684451759.

It is an arithmetic number, because the mean of its divisors is an integer number (5053355262).

Almost surely, 2^20213421042 is an apocalyptic number.

20213421042 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.

20213421042 is a wasteful number, since it uses less digits than its factorization.

20213421042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368903512.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20213421042 its reverse (24012431202), we get a palindrome (44225852244).

The spelling of 20213421042 in words is "twenty billion, two hundred thirteen million, four hundred twenty-one thousand, forty-two".