20445927 has 8 divisors (see below), whose sum is σ = 27457920. Its totient is φ = 13532280.

The previous prime is 20445923. The next prime is 20445947. The reversal of 20445927 is 72954402.

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

It is not a de Polignac number, because 20445927 - 2² = 20445923 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445923) 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, 24099 + ... + 24932.

It is an arithmetic number, because the mean of its divisors is an integer number (3432240).

Almost surely, 2^20445927 is an apocalyptic number.

20445927 is a deficient number, since it is larger than the sum of its proper divisors (7011993).

20445927 is a wasteful number, since it uses less digits than its factorization.

20445927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49173.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20445927 is about 4521.7172622799. The cubic root of 20445927 is about 273.4443380516. Note that the first 3 decimals are identical.

The spelling of 20445927 in words is "twenty million, four hundred forty-five thousand, nine hundred twenty-seven".