21335171307 has 32 divisors (see below), whose sum is σ = 30551040000. Its totient is φ = 13203217440.

The previous prime is 21335171303. The next prime is 21335171317. The reversal of 21335171307 is 70317153312.

It is not a de Polignac number, because 21335171307 - 2² = 21335171303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21335171303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1035694 + ... + 1056092.

It is an arithmetic number, because the mean of its divisors is an integer number (954720000).

Almost surely, 2^21335171307 is an apocalyptic number.

21335171307 is a deficient number, since it is larger than the sum of its proper divisors (9215868693).

21335171307 is a wasteful number, since it uses less digits than its factorization.

21335171307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20791.

The product of its (nonzero) digits is 13230, while the sum is 33.

The spelling of 21335171307 in words is "twenty-one billion, three hundred thirty-five million, one hundred seventy-one thousand, three hundred seven".