21872627 has 8 divisors (see below), whose sum is σ = 25255776. Its totient is φ = 18554112.

The previous prime is 21872611. The next prime is 21872647. The reversal of 21872627 is 72627812.

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 21872627 - 2⁴ = 21872611 is a prime.

It is a super-2 number, since 2×21872627² = 956823623762258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21872647) 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, 15428 + ... + 16785.

It is an arithmetic number, because the mean of its divisors is an integer number (3156972).

Almost surely, 2^21872627 is an apocalyptic number.

21872627 is a deficient number, since it is larger than the sum of its proper divisors (3383149).

21872627 is an equidigital number, since it uses as much as digits as its factorization.

21872627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32317.

The product of its digits is 18816, while the sum is 35.

The square root of 21872627 is about 4676.8180422163. The cubic root of 21872627 is about 279.6621222066.

The spelling of 21872627 in words is "twenty-one million, eight hundred seventy-two thousand, six hundred twenty-seven".