20544901 has 8 divisors (see below), whose sum is σ = 22429400. Its totient is φ = 18703872.

The previous prime is 20544899. The next prime is 20544929. The reversal of 20544901 is 10944502.

It can be written as a sum of positive squares in 4 ways, for example, as 564001 + 19980900 = 751^2 + 4470^2 .

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 20544901 - 2¹ = 20544899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544991) 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, 9876 + ... + 11773.

It is an arithmetic number, because the mean of its divisors is an integer number (2803675).

Almost surely, 2^20544901 is an apocalyptic number.

It is an amenable number.

20544901 is a deficient number, since it is larger than the sum of its proper divisors (1884499).

20544901 is a wasteful number, since it uses less digits than its factorization.

20544901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21735.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20544901 is about 4532.6483428565. The cubic root of 20544901 is about 273.8848549165.

The spelling of 20544901 in words is "twenty million, five hundred forty-four thousand, nine hundred one".