21455005413413 has 8 divisors (see below), whose sum is σ = 25205880485856. Its totient is φ = 18004200346800.

The previous prime is 21455005413367. The next prime is 21455005413449. The reversal of 21455005413413 is 31431450055412.

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 21455005413413 - 2³⁰ = 21453931671589 is a prime.

It is a super-2 number, since 2×21455005413413² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455005413463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75017501303 + ... + 75017501588.

It is an arithmetic number, because the mean of its divisors is an integer number (3150735060732).

Almost surely, 2^{21455005413413} is an apocalyptic number.

It is an amenable number.

21455005413413 is a deficient number, since it is larger than the sum of its proper divisors (3750875072443).

21455005413413 is a wasteful number, since it uses less digits than its factorization.

21455005413413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150035002915.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 21455005413413 its reverse (31431450055412), we get a palindrome (52886455468825).

The spelling of 21455005413413 in words is "twenty-one trillion, four hundred fifty-five billion, five million, four hundred thirteen thousand, four hundred thirteen".