21067514 has 16 divisors (see below), whose sum is σ = 35206920. Its totient is φ = 9387840.

The previous prime is 21067513. The next prime is 21067531. The reversal of 21067514 is 41576012.

It can be written as a sum of positive squares in 4 ways, for example, as 14691889 + 6375625 = 3833^2 + 2525^2 .

It is a super-2 number, since 2×21067514² = 887680292280392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (21067513) 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, 13217 + ... + 14724.

Almost surely, 2^21067514 is an apocalyptic number.

21067514 is a deficient number, since it is larger than the sum of its proper divisors (14139406).

21067514 is a wasteful number, since it uses less digits than its factorization.

21067514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27985.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 21067514 is about 4589.9361651335. The cubic root of 21067514 is about 276.1877616865.

It can be divided in two parts, 2106 and 7514, that multiplied together give a square (15824484 = 3978²).

The spelling of 21067514 in words is "twenty-one million, sixty-seven thousand, five hundred fourteen".