21700967 has 8 divisors (see below), whose sum is σ = 22289280. Its totient is φ = 21120120.

The previous prime is 21700963. The next prime is 21700969. The reversal of 21700967 is 76900712.

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 21700967 - 2² = 21700963 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 (21700963) 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, 4292 + ... + 7862.

It is an arithmetic number, because the mean of its divisors is an integer number (2786160).

Almost surely, 2^21700967 is an apocalyptic number.

21700967 is a deficient number, since it is larger than the sum of its proper divisors (588313).

21700967 is a wasteful number, since it uses less digits than its factorization.

21700967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 21700967 is about 4658.4296710372. The cubic root of 21700967 is about 278.9285883274.

The spelling of 21700967 in words is "twenty-one million, seven hundred thousand, nine hundred sixty-seven".