20421627 has 8 divisors (see below), whose sum is σ = 27255120. Its totient is φ = 13601280.

The previous prime is 20421593. The next prime is 20421629. The reversal of 20421627 is 72612402.

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

It is not a de Polignac number, because 20421627 - 2²³ = 12033019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20421597 and 20421606.

It is not an unprimeable number, because it can be changed into a prime (20421629) 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, 1227 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (3406890).

Almost surely, 2^20421627 is an apocalyptic number.

20421627 is a deficient number, since it is larger than the sum of its proper divisors (6833493).

20421627 is a wasteful number, since it uses less digits than its factorization.

20421627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20421627 is about 4519.0294311943. The cubic root of 20421627 is about 273.3359655044.

The spelling of 20421627 in words is "twenty million, four hundred twenty-one thousand, six hundred twenty-seven".