20825344 has 18 divisors (see below), whose sum is σ = 41569850. Its totient is φ = 10412544.

The previous prime is 20825341. The next prime is 20825347. The reversal of 20825344 is 44352802.

It is an interprime number because it is at equal distance from previous prime (20825341) and next prime (20825347).

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 9535744 = 3360^2 + 3088^2 .

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 polite number, since it can be written as a sum of consecutive naturals, namely, 40419 + ... + 40930.

Almost surely, 2^20825344 is an apocalyptic number.

It is an amenable number.

20825344 is a deficient number, since it is larger than the sum of its proper divisors (20744506).

20825344 is an frugal number, since it uses more digits than its factorization.

20825344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81365 (or 81351 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 20825344 is about 4563.4793743371. The cubic root of 20825344 is about 275.1254259808.

It can be divided in two parts, 208 and 25344, that added together give a palindrome (25552).

The spelling of 20825344 in words is "twenty million, eight hundred twenty-five thousand, three hundred forty-four".