20549898 has 12 divisors (see below), whose sum is σ = 44524818. Its totient is φ = 6849960.

The previous prime is 20549891. The next prime is 20549909. The reversal of 20549898 is 89894502.

20549898 is a `hidden beast` number, since 20 + 549 + 89 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 56169 = 4527^2 + 237^2 .

It is not an unprimeable number, because it can be changed into a prime (20549891) 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, 570813 + ... + 570848.

Almost surely, 2^20549898 is an apocalyptic number.

20549898 is an abundant number, since it is smaller than the sum of its proper divisors (23974920).

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

20549898 is a wasteful number, since it uses less digits than its factorization.

20549898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141669 (or 1141666 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 20549898 is about 4533.1995323392. The cubic root of 20549898 is about 273.9070581820.

The spelling of 20549898 in words is "twenty million, five hundred forty-nine thousand, eight hundred ninety-eight".