21014067 has 12 divisors (see below), whose sum is σ = 29021720. Its totient is φ = 13524672.

The previous prime is 21014047. The next prime is 21014069. The reversal of 21014067 is 76041012.

It is not a de Polignac number, because 21014067 - 2¹⁰ = 21013043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014069) 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, 1642 + ... + 6687.

Almost surely, 2^21014067 is an apocalyptic number.

21014067 is a deficient number, since it is larger than the sum of its proper divisors (8007653).

21014067 is an equidigital number, since it uses as much as digits as its factorization.

21014067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8390 (or 8361 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21014067 is about 4584.1102735427. The cubic root of 21014067 is about 275.9540067237.

Adding to 21014067 its reverse (76041012), we get a palindrome (97055079).

The spelling of 21014067 in words is "twenty-one million, fourteen thousand, sixty-seven".