20195545 has 8 divisors (see below), whose sum is σ = 24304320. Its totient is φ = 16110000.

The previous prime is 20195543. The next prime is 20195551. The reversal of 20195545 is 54559102.

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

It is not a de Polignac number, because 20195545 - 2¹ = 20195543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20195543) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3831 + ... + 7420.

It is an arithmetic number, because the mean of its divisors is an integer number (3038040).

Almost surely, 2^20195545 is an apocalyptic number.

It is an amenable number.

20195545 is a deficient number, since it is larger than the sum of its proper divisors (4108775).

20195545 is a wasteful number, since it uses less digits than its factorization.

20195545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11615.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 20195545 is about 4493.9453712746. The cubic root of 20195545 is about 272.3235453879.

The spelling of 20195545 in words is "twenty million, one hundred ninety-five thousand, five hundred forty-five".