20504870 has 8 divisors (see below), whose sum is σ = 36908784. Its totient is φ = 8201944.

The previous prime is 20504843. The next prime is 20504903. The reversal of 20504870 is 7840502.

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, 1025234 + ... + 1025253.

It is an arithmetic number, because the mean of its divisors is an integer number (4613598).

Almost surely, 2^20504870 is an apocalyptic number.

20504870 is a deficient number, since it is larger than the sum of its proper divisors (16403914).

20504870 is a wasteful number, since it uses less digits than its factorization.

20504870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050494.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20504870 is about 4528.2303386643. The cubic root of 20504870 is about 273.7068543304.

The spelling of 20504870 in words is "twenty million, five hundred four thousand, eight hundred seventy".