21730409167 has 8 divisors (see below), whose sum is σ = 21852008640. Its totient is φ = 21609132960.

The previous prime is 21730409153. The next prime is 21730409201. The reversal of 21730409167 is 76190403712.

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 21730409167 - 2¹⁹ = 21729884879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21730409147) 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, 54634 + ... + 215512.

It is an arithmetic number, because the mean of its divisors is an integer number (2731501080).

Almost surely, 2^21730409167 is an apocalyptic number.

21730409167 is a deficient number, since it is larger than the sum of its proper divisors (121599473).

21730409167 is a wasteful number, since it uses less digits than its factorization.

21730409167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161633.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 21730409167 in words is "twenty-one billion, seven hundred thirty million, four hundred nine thousand, one hundred sixty-seven".