20464870 has 8 divisors (see below), whose sum is σ = 36836784. Its totient is φ = 8185944.

The previous prime is 20464849. The next prime is 20464883. The reversal of 20464870 is 7846402.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023234 + ... + 1023253.

It is an arithmetic number, because the mean of its divisors is an integer number (4604598).

Almost surely, 2^20464870 is an apocalyptic number.

20464870 is a deficient number, since it is larger than the sum of its proper divisors (16371914).

20464870 is a wasteful number, since it uses less digits than its factorization.

20464870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046494.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20464870 is about 4523.8114461149. The cubic root of 20464870 is about 273.5287600364.

The spelling of 20464870 in words is "twenty million, four hundred sixty-four thousand, eight hundred seventy".