20884090 has 8 divisors (see below), whose sum is σ = 37591380. Its totient is φ = 8353632.

The previous prime is 20884079. The next prime is 20884099. The reversal of 20884090 is 9048802.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 822649 = 4479^2 + 907^2 .

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

It is a super-2 number, since 2×20884090² = 872290430256200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20884099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044195 + ... + 1044214.

Almost surely, 2^20884090 is an apocalyptic number.

20884090 is a deficient number, since it is larger than the sum of its proper divisors (16707290).

20884090 is a wasteful number, since it uses less digits than its factorization.

20884090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088416.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20884090 is about 4569.9113776965. The cubic root of 20884090 is about 275.3838826076.

The spelling of 20884090 in words is "twenty million, eight hundred eighty-four thousand, ninety".