20631485 has 8 divisors (see below), whose sum is σ = 28294656. Its totient is φ = 14147280.

The previous prime is 20631467. The next prime is 20631491. The reversal of 20631485 is 58413602.

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

It is not a de Polignac number, because 20631485 - 2⁸ = 20631229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294701 + ... + 294770.

It is an arithmetic number, because the mean of its divisors is an integer number (3536832).

Almost surely, 2^20631485 is an apocalyptic number.

It is an amenable number.

20631485 is a deficient number, since it is larger than the sum of its proper divisors (7663171).

20631485 is an equidigital number, since it uses as much as digits as its factorization.

20631485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589483.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20631485 is about 4542.1894500340. The cubic root of 20631485 is about 274.2690672121.

The spelling of 20631485 in words is "twenty million, six hundred thirty-one thousand, four hundred eighty-five".