20451344 has 10 divisors (see below), whose sum is σ = 39624510. Its totient is φ = 10225664.

The previous prime is 20451329. The next prime is 20451373. The reversal of 20451344 is 44315402.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 8479744 = 3460^2 + 2912^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639089 + ... + 639120.

It is an arithmetic number, because the mean of its divisors is an integer number (3962451).

Almost surely, 2^20451344 is an apocalyptic number.

It is an amenable number.

20451344 is a deficient number, since it is larger than the sum of its proper divisors (19173166).

20451344 is a wasteful number, since it uses less digits than its factorization.

20451344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278217 (or 1278211 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20451344 is about 4522.3162206993. The cubic root of 20451344 is about 273.4684849503.

Adding to 20451344 its reverse (44315402), we get a palindrome (64766746).

The spelling of 20451344 in words is "twenty million, four hundred fifty-one thousand, three hundred forty-four".