20243776 has 56 divisors (see below), whose sum is σ = 46614080. Its totient is φ = 8543232.

The previous prime is 20243767. The next prime is 20243777. The reversal of 20243776 is 67734202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×20243776³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32395 + ... + 33013.

Almost surely, 2^20243776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20243776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23307040).

20243776 is an abundant number, since it is smaller than the sum of its proper divisors (26370304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20243776 is an equidigital number, since it uses as much as digits as its factorization.

20243776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20243776 is about 4499.3083912975. The cubic root of 20243776 is about 272.5401607335.

Adding to 20243776 its reverse (67734202), we get a palindrome (87977978).

The spelling of 20243776 in words is "twenty million, two hundred forty-three thousand, seven hundred seventy-six".