21049627 has 2 divisors, whose sum is σ = 21049628. Its totient is φ = 21049626.

The previous prime is 21049597. The next prime is 21049643. The reversal of 21049627 is 72694012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21049627 - 2⁷ = 21049499 is a prime.

It is a super-3 number, since 3×21049627³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21049667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10524813 + 10524814.

It is an arithmetic number, because the mean of its divisors is an integer number (10524814).

Almost surely, 2^21049627 is an apocalyptic number.

21049627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21049627 is an equidigital number, since it uses as much as digits as its factorization.

21049627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 21049627 is about 4587.9872493284. The cubic root of 21049627 is about 276.1095754440.

The spelling of 21049627 in words is "twenty-one million, forty-nine thousand, six hundred twenty-seven".