21174157133 has 8 divisors (see below), whose sum is σ = 21378226752. Its totient is φ = 20970202176.

The previous prime is 21174157127. The next prime is 21174157171. The reversal of 21174157133 is 33175147112.

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 21174157133 - 2⁸ = 21174156877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21174157093 and 21174157102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21174157183) 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, 368816 + ... + 422342.

It is an arithmetic number, because the mean of its divisors is an integer number (2672278344).

Almost surely, 2^21174157133 is an apocalyptic number.

It is an amenable number.

21174157133 is a deficient number, since it is larger than the sum of its proper divisors (204069619).

21174157133 is a wasteful number, since it uses less digits than its factorization.

21174157133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57331.

The product of its digits is 17640, while the sum is 35.

The spelling of 21174157133 in words is "twenty-one billion, one hundred seventy-four million, one hundred fifty-seven thousand, one hundred thirty-three".