20407364 has 6 divisors (see below), whose sum is σ = 35712894. Its totient is φ = 10203680.

The previous prime is 20407363. The next prime is 20407391. The reversal of 20407364 is 46370402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15602500 + 4804864 = 3950^2 + 2192^2 .

It is not an unprimeable number, because it can be changed into a prime (20407363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550917 + ... + 2550924.

It is an arithmetic number, because the mean of its divisors is an integer number (5952149).

Almost surely, 2^20407364 is an apocalyptic number.

It is an amenable number.

20407364 is a deficient number, since it is larger than the sum of its proper divisors (15305530).

20407364 is a wasteful number, since it uses less digits than its factorization.

20407364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101845 (or 5101843 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20407364 is about 4517.4510512013. The cubic root of 20407364 is about 273.2723156811.

Adding to 20407364 its reverse (46370402), we get a palindrome (66777766).

The spelling of 20407364 in words is "twenty million, four hundred seven thousand, three hundred sixty-four".