20012776 has 48 divisors (see below), whose sum is σ = 45964800. Its totient is φ = 8122464.

The previous prime is 20012771. The next prime is 20012801. The reversal of 20012776 is 67721002.

It is a super-2 number, since 2×20012776² = 801022406452352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20012776.

It is not an unprimeable number, because it can be changed into a prime (20012771) 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 11 ways as a sum of consecutive naturals, for example, 6105 + ... + 8791.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^20012776 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 20012776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22982400).

20012776 is an abundant number, since it is smaller than the sum of its proper divisors (25952024).

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

20012776 is a wasteful number, since it uses less digits than its factorization.

20012776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20012776 is about 4473.5641271809. The cubic root of 20012776 is about 271.4995483556.

Adding to 20012776 its reverse (67721002), we get a palindrome (87733778).

The spelling of 20012776 in words is "twenty million, twelve thousand, seven hundred seventy-six".