20421120440162 has 8 divisors (see below), whose sum is σ = 32987963787996. Its totient is φ = 9425132510832.

The previous prime is 20421120440131. The next prime is 20421120440167. The reversal of 20421120440162 is 26104402112402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20161276397161 + 259844043001 = 4490131^2 + 509749^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20421120440167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392713854593 + ... + 392713854644.

Almost surely, 2^{20421120440162} is an apocalyptic number.

20421120440162 is a deficient number, since it is larger than the sum of its proper divisors (12566843347834).

20421120440162 is a wasteful number, since it uses less digits than its factorization.

20421120440162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785427709252.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 20421120440162 its reverse (26104402112402), we get a palindrome (46525522552564).

The spelling of 20421120440162 in words is "twenty trillion, four hundred twenty-one billion, one hundred twenty million, four hundred forty thousand, one hundred sixty-two".