21410667 has 12 divisors (see below), whose sum is σ = 32745960. Its totient is φ = 13434048.

The previous prime is 21410657. The next prime is 21410693. The reversal of 21410667 is 76601412.

It is not a de Polignac number, because 21410667 - 2²² = 17216363 is a prime.

It is a super-2 number, since 2×21410667² = 916833322769778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21410667.

It is not an unprimeable number, because it can be changed into a prime (21410617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69817 + ... + 70122.

It is an arithmetic number, because the mean of its divisors is an integer number (2728830).

Almost surely, 2^21410667 is an apocalyptic number.

21410667 is a deficient number, since it is larger than the sum of its proper divisors (11335293).

21410667 is a wasteful number, since it uses less digits than its factorization.

21410667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139962 (or 139959 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21410667 is about 4627.1661954159. The cubic root of 21410667 is about 277.6792316685.

The spelling of 21410667 in words is "twenty-one million, four hundred ten thousand, six hundred sixty-seven".