20449854 has 32 divisors (see below), whose sum is σ = 46506240. Its totient is φ = 6657336.

The previous prime is 20449787. The next prime is 20449873. The reversal of 20449854 is 45894402.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2082 + ... + 6725.

It is an arithmetic number, because the mean of its divisors is an integer number (1453320).

Almost surely, 2^20449854 is an apocalyptic number.

20449854 is an abundant number, since it is smaller than the sum of its proper divisors (26056386).

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

20449854 is a wasteful number, since it uses less digits than its factorization.

20449854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8861 (or 8855 counting only the distinct ones).

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

The square root of 20449854 is about 4522.1514791081. The cubic root of 20449854 is about 273.4618435296.

The spelling of 20449854 in words is "twenty million, four hundred forty-nine thousand, eight hundred fifty-four".