20884970 has 8 divisors (see below), whose sum is σ = 37592964. Its totient is φ = 8353984.

The previous prime is 20884951. The next prime is 20885003. The reversal of 20884970 is 7948802.

It can be written as a sum of positive squares in 2 ways, for example, as 20784481 + 100489 = 4559^2 + 317^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044239 + ... + 1044258.

Almost surely, 2^20884970 is an apocalyptic number.

20884970 is a deficient number, since it is larger than the sum of its proper divisors (16707994).

20884970 is a wasteful number, since it uses less digits than its factorization.

20884970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088504.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20884970 is about 4570.0076586369. The cubic root of 20884970 is about 275.3877505347.

The spelling of 20884970 in words is "twenty million, eight hundred eighty-four thousand, nine hundred seventy".