20481895 has 16 divisors (see below), whose sum is σ = 28689408. Its totient is φ = 13744800.

The previous prime is 20481887. The next prime is 20481913. The reversal of 20481895 is 59818402.

It is not a de Polignac number, because 20481895 - 2³ = 20481887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4581 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (1793088).

Almost surely, 2^20481895 is an apocalyptic number.

20481895 is a deficient number, since it is larger than the sum of its proper divisors (8207513).

20481895 is a wasteful number, since it uses less digits than its factorization.

20481895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12510.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 20481895 is about 4525.6927646494. The cubic root of 20481895 is about 273.6045897612.

The spelling of 20481895 in words is "twenty million, four hundred eighty-one thousand, eight hundred ninety-five".