21059914 has 16 divisors (see below), whose sum is σ = 32177736. Its totient is φ = 10336000.

The previous prime is 21059911. The next prime is 21059933. The reversal of 21059914 is 41995012.

It can be written as a sum of positive squares in 4 ways, for example, as 17514225 + 3545689 = 4185^2 + 1883^2 .

It is not an unprimeable number, because it can be changed into a prime (21059911) 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, 27294 + ... + 28054.

Almost surely, 2^21059914 is an apocalyptic number.

21059914 is a deficient number, since it is larger than the sum of its proper divisors (11117822).

21059914 is a wasteful number, since it uses less digits than its factorization.

21059914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 21059914 is about 4589.1081922308. The cubic root of 21059914 is about 276.1545465756.

The spelling of 21059914 in words is "twenty-one million, fifty-nine thousand, nine hundred fourteen".