20101331442420 has 36 divisors (see below), whose sum is σ = 60974038709220. Its totient is φ = 5360355051264.

The previous prime is 20101331442403. The next prime is 20101331442469. The reversal of 20101331442420 is 2424413310102.

20101331442420 is a `hidden beast` number, since 2 + 0 + 101 + 3 + 314 + 4 + 242 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2237758695396 + 17863572747024 = 1495914^2 + 4226532^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55837031605 + ... + 55837031964.

Almost surely, 2^{20101331442420} is an apocalyptic number.

20101331442420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101331442420 is an abundant number, since it is smaller than the sum of its proper divisors (40872707266800).

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

20101331442420 is a wasteful number, since it uses less digits than its factorization.

20101331442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111674063584 (or 111674063579 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20101331442420 its reverse (2424413310102), we get a palindrome (22525744752522).

The spelling of 20101331442420 in words is "twenty trillion, one hundred one billion, three hundred thirty-one million, four hundred forty-two thousand, four hundred twenty".