21330426440653 has 16 divisors (see below), whose sum is σ = 23312061843840. Its totient is φ = 19355880044800.

The previous prime is 21330426440639. The next prime is 21330426440669. The reversal of 21330426440653 is 35604462403312.

It is a cyclic number.

It is not a de Polignac number, because 21330426440653 - 2¹³ = 21330426432461 is a prime.

It is a super-2 number, since 2×21330426440653² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330426446653) 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, 96885768 + ... + 97105678.

It is an arithmetic number, because the mean of its divisors is an integer number (1457003865240).

Almost surely, 2^{21330426440653} is an apocalyptic number.

It is an amenable number.

21330426440653 is a deficient number, since it is larger than the sum of its proper divisors (1981635403187).

21330426440653 is a wasteful number, since it uses less digits than its factorization.

21330426440653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235988.

The product of its (nonzero) digits is 1244160, while the sum is 43.

Adding to 21330426440653 its reverse (35604462403312), we get a palindrome (56934888843965).

The spelling of 21330426440653 in words is "twenty-one trillion, three hundred thirty billion, four hundred twenty-six million, four hundred forty thousand, six hundred fifty-three".