20825487 has 12 divisors (see below), whose sum is σ = 30894760. Its totient is φ = 13508208.

The previous prime is 20825479. The next prime is 20825491. The reversal of 20825487 is 78452802.

It is a happy number.

It is not a de Polignac number, because 20825487 - 2³ = 20825479 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 (20825437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30937 + ... + 31602.

Almost surely, 2^20825487 is an apocalyptic number.

20825487 is a deficient number, since it is larger than the sum of its proper divisors (10069273).

20825487 is a wasteful number, since it uses less digits than its factorization.

20825487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62582 (or 62579 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 20825487 is about 4563.4950421798. The cubic root of 20825487 is about 275.1260557078.

It can be divided in two parts, 20825 and 487, that added together give a palindrome (21312).

The spelling of 20825487 in words is "twenty million, eight hundred twenty-five thousand, four hundred eighty-seven".