20826505 has 8 divisors (see below), whose sum is σ = 28562112. Its totient is φ = 14281008.

The previous prime is 20826493. The next prime is 20826517. The reversal of 20826505 is 50562802.

It is an interprime number because it is at equal distance from previous prime (20826493) and next prime (20826517).

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

It is not a de Polignac number, because 20826505 - 2⁵ = 20826473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297487 + ... + 297556.

It is an arithmetic number, because the mean of its divisors is an integer number (3570264).

Almost surely, 2^20826505 is an apocalyptic number.

It is an amenable number.

20826505 is a deficient number, since it is larger than the sum of its proper divisors (7735607).

20826505 is an equidigital number, since it uses as much as digits as its factorization.

20826505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595055.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 20826505 is about 4563.6065781353. The cubic root of 20826505 is about 275.1305385764.

It can be divided in two parts, 2082 and 6505, that multiplied together give a triangular number (13543410 = T₅₂₀₄).

The spelling of 20826505 in words is "twenty million, eight hundred twenty-six thousand, five hundred five".