21501414413045 has 64 divisors (see below), whose sum is σ = 30853823616000. Its totient is φ = 14064299606016.

The previous prime is 21501414413027. The next prime is 21501414413051. The reversal of 21501414413045 is 54031441410512.

It is a cyclic number.

It is not a de Polignac number, because 21501414413045 - 2²⁶ = 21501347304181 is a prime.

It is a super-2 number, since 2×21501414413045² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a junction number, because it is equal to n+sod(n) for n = 21501414412996 and 21501414413014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 438878411 + ... + 438927399.

It is an arithmetic number, because the mean of its divisors is an integer number (482090994000).

Almost surely, 2^{21501414413045} is an apocalyptic number.

It is an amenable number.

21501414413045 is a deficient number, since it is larger than the sum of its proper divisors (9352409202955).

21501414413045 is a wasteful number, since it uses less digits than its factorization.

21501414413045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50502.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 21501414413045 its reverse (54031441410512), we get a palindrome (75532855823557).

The spelling of 21501414413045 in words is "twenty-one trillion, five hundred one billion, four hundred fourteen million, four hundred thirteen thousand, forty-five".