20825343 has 84 divisors (see below), whose sum is σ = 40371048. Its totient is φ = 10614240.

The previous prime is 20825341. The next prime is 20825347. The reversal of 20825343 is 34352802.

It is not a de Polignac number, because 20825343 - 2¹ = 20825341 is a prime.

It is a super-2 number, since 2×20825343² = 867389822135298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825341) by changing a digit.

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 83 ways as a sum of consecutive naturals, for example, 392905 + ... + 392957.

Almost surely, 2^20825343 is an apocalyptic number.

20825343 is a deficient number, since it is larger than the sum of its proper divisors (19545705).

20825343 is an equidigital number, since it uses as much as digits as its factorization.

20825343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20825343 is about 4563.4792647716. The cubic root of 20825343 is about 275.1254215771.

The spelling of 20825343 in words is "twenty million, eight hundred twenty-five thousand, three hundred forty-three".