21404545027175 has 24 divisors (see below), whose sum is σ = 27494629992960. Its totient is φ = 16512704805600.

The previous prime is 21404545027163. The next prime is 21404545027199. The reversal of 21404545027175 is 57172054540412.

It is not a de Polignac number, because 21404545027175 - 2⁶ = 21404545027111 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48577085 + ... + 49015734.

It is an arithmetic number, because the mean of its divisors is an integer number (1145609583040).

Almost surely, 2^{21404545027175} is an apocalyptic number.

21404545027175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21404545027175 is a deficient number, since it is larger than the sum of its proper divisors (6090084965785).

21404545027175 is a wasteful number, since it uses less digits than its factorization.

21404545027175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97593143 (or 97593138 counting only the distinct ones).

The product of its (nonzero) digits is 1568000, while the sum is 47.

Adding to 21404545027175 its reverse (57172054540412), we get a palindrome (78576599567587).

The spelling of 21404545027175 in words is "twenty-one trillion, four hundred four billion, five hundred forty-five million, twenty-seven thousand, one hundred seventy-five".