20841490 has 16 divisors (see below), whose sum is σ = 39721752. Its totient is φ = 7846144.

The previous prime is 20841481. The next prime is 20841523. The reversal of 20841490 is 9414802.

It can be written as a sum of positive squares in 4 ways, for example, as 12552849 + 8288641 = 3543^2 + 2879^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61129 + ... + 61468.

Almost surely, 2^20841490 is an apocalyptic number.

20841490 is a deficient number, since it is larger than the sum of its proper divisors (18880262).

20841490 is a wasteful number, since it uses less digits than its factorization.

20841490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122621.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20841490 is about 4565.2480765014. The cubic root of 20841490 is about 275.1965096823.

The spelling of 20841490 in words is "twenty million, eight hundred forty-one thousand, four hundred ninety".