21131416023553 has 8 divisors (see below), whose sum is σ = 23267897339040. Its totient is φ = 19030841957280.

The previous prime is 21131416023539. The next prime is 21131416023583. The reversal of 21131416023553 is 35532061413112.

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 21131416023553 - 2¹⁷ = 21131415892481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131416023583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8976811068 + ... + 8976813421.

It is an arithmetic number, because the mean of its divisors is an integer number (2908487167380).

Almost surely, 2^{21131416023553} is an apocalyptic number.

It is an amenable number.

21131416023553 is a deficient number, since it is larger than the sum of its proper divisors (2136481315487).

21131416023553 is a wasteful number, since it uses less digits than its factorization.

21131416023553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17953624607.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 21131416023553 its reverse (35532061413112), we get a palindrome (56663477436665).

The spelling of 21131416023553 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred sixteen million, twenty-three thousand, five hundred fifty-three".