21460667 has 4 divisors (see below), whose sum is σ = 22200720. Its totient is φ = 20720616.

The previous prime is 21460657. The next prime is 21460697. The reversal of 21460667 is 76606412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21460667 - 2⁶ = 21460603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21460657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369983 + ... + 370040.

It is an arithmetic number, because the mean of its divisors is an integer number (5550180).

Almost surely, 2^21460667 is an apocalyptic number.

21460667 is a deficient number, since it is larger than the sum of its proper divisors (740053).

21460667 is an equidigital number, since it uses as much as digits as its factorization.

21460667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740052.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 21460667 is about 4632.5659196605. The cubic root of 21460667 is about 277.8952169671.

The spelling of 21460667 in words is "twenty-one million, four hundred sixty thousand, six hundred sixty-seven".