20884870 has 8 divisors (see below), whose sum is σ = 37592784. Its totient is φ = 8353944.

The previous prime is 20884861. The next prime is 20884907. The reversal of 20884870 is 7848802.

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

It is a congruent 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, 1044234 + ... + 1044253.

It is an arithmetic number, because the mean of its divisors is an integer number (4699098).

Almost surely, 2^20884870 is an apocalyptic number.

20884870 is a deficient number, since it is larger than the sum of its proper divisors (16707914).

20884870 is a wasteful number, since it uses less digits than its factorization.

20884870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088494.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 20884870 is about 4569.9967177231. The cubic root of 20884870 is about 275.3873110030.

It can be divided in two parts, 208 and 84870, that added together give a triangular number (85078 = T₄₁₂).

The spelling of 20884870 in words is "twenty million, eight hundred eighty-four thousand, eight hundred seventy".