20368548 has 18 divisors (see below), whose sum is σ = 51487254. Its totient is φ = 6789504.

The previous prime is 20368487. The next prime is 20368549. The reversal of 20368548 is 84586302.

It can be written as a sum of positive squares in only one way, i.e., 20358144 + 10404 = 4512^2 + 102^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 565793 = 20368548 / (2 + 0 + 3 + 6 + 8 + 5 + 4 + 8).

It is not an unprimeable number, because it can be changed into a prime (20368549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282861 + ... + 282932.

It is an arithmetic number, because the mean of its divisors is an integer number (2860403).

Almost surely, 2^20368548 is an apocalyptic number.

It is an amenable number.

20368548 is an abundant number, since it is smaller than the sum of its proper divisors (31118706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20368548 is a wasteful number, since it uses less digits than its factorization.

20368548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565803 (or 565798 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 20368548 is about 4513.1527782693. The cubic root of 20368548 is about 273.0989457384.

The spelling of 20368548 in words is "twenty million, three hundred sixty-eight thousand, five hundred forty-eight".