20444897 has 8 divisors (see below), whose sum is σ = 23615712. Its totient is φ = 17492800.

The previous prime is 20444887. The next prime is 20444911. The reversal of 20444897 is 79844402.

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 20444897 - 2⁶ = 20444833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20444897.

It is not an unprimeable number, because it can be changed into a prime (20444867) 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, 54479 + ... + 54852.

It is an arithmetic number, because the mean of its divisors is an integer number (2951964).

Almost surely, 2^20444897 is an apocalyptic number.

It is an amenable number.

20444897 is a deficient number, since it is larger than the sum of its proper divisors (3170815).

20444897 is a wasteful number, since it uses less digits than its factorization.

20444897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109359.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 20444897 is about 4521.6033660639. The cubic root of 20444897 is about 273.4397462259.

The spelling of 20444897 in words is "twenty million, four hundred forty-four thousand, eight hundred ninety-seven".