20233211544021 has 16 divisors (see below), whose sum is σ = 30831967875200. Its totient is φ = 11561682382848.

The previous prime is 20233211544019. The next prime is 20233211544031. The reversal of 20233211544021 is 12044511233202.

It is a happy number.

It is not a de Polignac number, because 20233211544021 - 2¹ = 20233211544019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20233211544021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233211544011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4729276 + ... + 7926693.

It is an arithmetic number, because the mean of its divisors is an integer number (1926997992200).

Almost surely, 2^{20233211544021} is an apocalyptic number.

20233211544021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20233211544021 is a deficient number, since it is larger than the sum of its proper divisors (10598756331179).

20233211544021 is a wasteful number, since it uses less digits than its factorization.

20233211544021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732108.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 20233211544021 its reverse (12044511233202), we get a palindrome (32277722777223).

The spelling of 20233211544021 in words is "twenty trillion, two hundred thirty-three billion, two hundred eleven million, five hundred forty-four thousand, twenty-one".