20641042 has 16 divisors (see below), whose sum is σ = 32242392. Its totient is φ = 9901440.

The previous prime is 20641039. The next prime is 20641057. The reversal of 20641042 is 24014602.

It can be written as a sum of positive squares in 4 ways, for example, as 20439441 + 201601 = 4521^2 + 449^2 .

It is a super-2 number, since 2×20641042² = 852105229691528, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3492 + ... + 7312.

Almost surely, 2^20641042 is an apocalyptic number.

20641042 is a deficient number, since it is larger than the sum of its proper divisors (11601350).

20641042 is a wasteful number, since it uses less digits than its factorization.

20641042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20641042 is about 4543.2413539234. The cubic root of 20641042 is about 274.3114100173.

Adding to 20641042 its reverse (24014602), we get a palindrome (44655644).

The spelling of 20641042 in words is "twenty million, six hundred forty-one thousand, forty-two".