21020244143413 has 8 divisors (see below), whose sum is σ = 22840333195520. Its totient is φ = 19271531132640.

The previous prime is 21020244143323. The next prime is 21020244143441. The reversal of 21020244143413 is 31434144202012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21020244143413 - 2²¹ = 21020242046261 is a prime.

It is a super-2 number, since 2×21020244143413² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020244143473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17844009720 + ... + 17844010897.

It is an arithmetic number, because the mean of its divisors is an integer number (2855041649440).

Almost surely, 2^{21020244143413} is an apocalyptic number.

It is an amenable number.

21020244143413 is a deficient number, since it is larger than the sum of its proper divisors (1820089052107).

21020244143413 is a wasteful number, since it uses less digits than its factorization.

21020244143413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35688020667.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21020244143413 its reverse (31434144202012), we get a palindrome (52454388345425).

The spelling of 21020244143413 in words is "twenty-one trillion, twenty billion, two hundred forty-four million, one hundred forty-three thousand, four hundred thirteen".