21061627 has 8 divisors (see below), whose sum is σ = 21855600. Its totient is φ = 20272224.

The previous prime is 21061619. The next prime is 21061639. The reversal of 21061627 is 72616012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21061627 - 2³ = 21061619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21061127) 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, 10348 + ... + 12214.

It is an arithmetic number, because the mean of its divisors is an integer number (2731950).

Almost surely, 2^21061627 is an apocalyptic number.

21061627 is a deficient number, since it is larger than the sum of its proper divisors (793973).

21061627 is a wasteful number, since it uses less digits than its factorization.

21061627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 21061627 is about 4589.2948260054. The cubic root of 21061627 is about 276.1620337843.

Adding to 21061627 its reverse (72616012), we get a palindrome (93677639).

The spelling of 21061627 in words is "twenty-one million, sixty-one thousand, six hundred twenty-seven".