20411984 has 10 divisors (see below), whose sum is σ = 39548250. Its totient is φ = 10205984.

The previous prime is 20411983. The next prime is 20412037. The reversal of 20411984 is 48911402.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 9784384 = 3260^2 + 3128^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411983) 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 as a sum of consecutive naturals, namely, 637859 + ... + 637890.

It is an arithmetic number, because the mean of its divisors is an integer number (3954825).

Almost surely, 2^20411984 is an apocalyptic number.

It is an amenable number.

20411984 is a deficient number, since it is larger than the sum of its proper divisors (19136266).

20411984 is a wasteful number, since it uses less digits than its factorization.

20411984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275757 (or 1275751 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20411984 is about 4517.9623725746. The cubic root of 20411984 is about 273.2929360616.

The spelling of 20411984 in words is "twenty million, four hundred eleven thousand, nine hundred eighty-four".