20850487 has 8 divisors (see below), whose sum is σ = 23887872. Its totient is φ = 17827800.

The previous prime is 20850463. The next prime is 20850491. The reversal of 20850487 is 78405802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20850487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439 + ... + 6472.

It is an arithmetic number, because the mean of its divisors is an integer number (2985984).

Almost surely, 2^20850487 is an apocalyptic number.

20850487 is a deficient number, since it is larger than the sum of its proper divisors (3037385).

20850487 is an equidigital number, since it uses as much as digits as its factorization.

20850487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7349.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 20850487 is about 4566.2333492716. The cubic root of 20850487 is about 275.2361035694.

The spelling of 20850487 in words is "twenty million, eight hundred fifty thousand, four hundred eighty-seven".