20545898 has 8 divisors (see below), whose sum is σ = 31324260. Its totient is φ = 10104480.

The previous prime is 20545883. The next prime is 20545907. The reversal of 20545898 is 89854502.

It can be written as a sum of positive squares in 2 ways, for example, as 17280649 + 3265249 = 4157^2 + 1807^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84083 + ... + 84326.

Almost surely, 2^20545898 is an apocalyptic number.

20545898 is a deficient number, since it is larger than the sum of its proper divisors (10778362).

20545898 is a wasteful number, since it uses less digits than its factorization.

20545898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168472.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 20545898 is about 4532.7583213756. The cubic root of 20545898 is about 273.8892851931.

The spelling of 20545898 in words is "twenty million, five hundred forty-five thousand, eight hundred ninety-eight".