21142175306 has 32 divisors (see below), whose sum is σ = 36729158400. Its totient is φ = 8940384000.

The previous prime is 21142175293. The next prime is 21142175321. The reversal of 21142175306 is 60357124112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281426 + ... + 348546.

It is an arithmetic number, because the mean of its divisors is an integer number (1147786200).

Almost surely, 2^21142175306 is an apocalyptic number.

21142175306 is a deficient number, since it is larger than the sum of its proper divisors (15586983094).

21142175306 is a wasteful number, since it uses less digits than its factorization.

21142175306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67430.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 21142175306 its reverse (60357124112), we get a palindrome (81499299418).

The spelling of 21142175306 in words is "twenty-one billion, one hundred forty-two million, one hundred seventy-five thousand, three hundred six".