20869485 has 32 divisors (see below), whose sum is σ = 41099520. Its totient is φ = 8805888.

The previous prime is 20869477. The next prime is 20869493. The reversal of 20869485 is 58496802.

It is an interprime number because it is at equal distance from previous prime (20869477) and next prime (20869493).

It is not a de Polignac number, because 20869485 - 2³ = 20869477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6280 + ... + 9009.

It is an arithmetic number, because the mean of its divisors is an integer number (1284360).

Almost surely, 2^20869485 is an apocalyptic number.

It is an amenable number.

20869485 is a deficient number, since it is larger than the sum of its proper divisors (20230035).

20869485 is a wasteful number, since it uses less digits than its factorization.

20869485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15317.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 20869485 is about 4568.3131460091. The cubic root of 20869485 is about 275.3196723317.

The spelling of 20869485 in words is "twenty million, eight hundred sixty-nine thousand, four hundred eighty-five".