21430036175 has 12 divisors (see below), whose sum is σ = 26579700576. Its totient is φ = 17139864000.

The previous prime is 21430036163. The next prime is 21430036231. The reversal of 21430036175 is 57163003412.

It is a de Polignac number, because none of the positive numbers 2^k-21430036175 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3002 + ... + 207048.

It is an arithmetic number, because the mean of its divisors is an integer number (2214975048).

Almost surely, 2^21430036175 is an apocalyptic number.

21430036175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21430036175 is a deficient number, since it is larger than the sum of its proper divisors (5149664401).

21430036175 is a wasteful number, since it uses less digits than its factorization.

21430036175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208258 (or 208253 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 21430036175 its reverse (57163003412), we get a palindrome (78593039587).

The spelling of 21430036175 in words is "twenty-one billion, four hundred thirty million, thirty-six thousand, one hundred seventy-five".