21362727 has 16 divisors (see below), whose sum is σ = 30976992. Its totient is φ = 13040640.

The previous prime is 21362717. The next prime is 21362729. The reversal of 21362727 is 72726312.

It is not a de Polignac number, because 21362727 - 2⁴ = 21362711 is a prime.

It is a super-2 number, since 2×21362727² = 912732209753058, which contains 22 as substring.

21362727 is a modest number, since divided by 2727 gives 2136 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21362694 and 21362703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21362729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3774 + ... + 7547.

It is an arithmetic number, because the mean of its divisors is an integer number (1936062).

Almost surely, 2^21362727 is an apocalyptic number.

21362727 is the 3774-th pentagonal number.

21362727 is a deficient number, since it is larger than the sum of its proper divisors (9614265).

21362727 is a wasteful number, since it uses less digits than its factorization.

21362727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11378.

The product of its digits is 7056, while the sum is 30.

The square root of 21362727 is about 4621.9830159792. The cubic root of 21362727 is about 277.4718289721.

The spelling of 21362727 in words is "twenty-one million, three hundred sixty-two thousand, seven hundred twenty-seven".