21670005367 has 8 divisors (see below), whose sum is σ = 21883816656. Its totient is φ = 21456580992.

The previous prime is 21670005347. The next prime is 21670005373. The reversal of 21670005367 is 76350007612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21670005367 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 (21670005347) 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, 16488 + ... + 208834.

It is an arithmetic number, because the mean of its divisors is an integer number (2735477082).

Almost surely, 2^21670005367 is an apocalyptic number.

21670005367 is a deficient number, since it is larger than the sum of its proper divisors (213811289).

21670005367 is a wasteful number, since it uses less digits than its factorization.

21670005367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193457.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 21670005367 in words is "twenty-one billion, six hundred seventy million, five thousand, three hundred sixty-seven".