20055490 has 32 divisors (see below), whose sum is σ = 44432640. Its totient is φ = 6346944.

The previous prime is 20055487. The next prime is 20055491. The reversal of 20055490 is 9455002.

It is not an unprimeable number, because it can be changed into a prime (20055491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10110 + ... + 11929.

It is an arithmetic number, because the mean of its divisors is an integer number (1388520).

Almost surely, 2^20055490 is an apocalyptic number.

20055490 is an abundant number, since it is smaller than the sum of its proper divisors (24377150).

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

20055490 is a wasteful number, since it uses less digits than its factorization.

20055490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22066.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20055490 is about 4478.3356283334. The cubic root of 20055490 is about 271.6925682373.

The spelling of 20055490 in words is "twenty million, fifty-five thousand, four hundred ninety".