20826631 has 8 divisors (see below), whose sum is σ = 23846400. Its totient is φ = 17818008.

The previous prime is 20826629. The next prime is 20826653. The reversal of 20826631 is 13662802.

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

It is a cyclic number.

It is not a de Polignac number, because 20826631 - 2¹ = 20826629 is a prime.

It is a super-2 number, since 2×20826631² = 867497117620322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20826631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826601) by changing a digit.

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, 1710 + ... + 6676.

It is an arithmetic number, because the mean of its divisors is an integer number (2980800).

Almost surely, 2^20826631 is an apocalyptic number.

20826631 is a deficient number, since it is larger than the sum of its proper divisors (3019769).

20826631 is an equidigital number, since it uses as much as digits as its factorization.

20826631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20826631 is about 4563.6203829854. The cubic root of 20826631 is about 275.1310934203.

The spelling of 20826631 in words is "twenty million, eight hundred twenty-six thousand, six hundred thirty-one".