20945042 has 16 divisors (see below), whose sum is σ = 33549120. Its totient is φ = 9783312.

The previous prime is 20945039. The next prime is 20945051. The reversal of 20945042 is 24054902.

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, 3317 + ... + 7272.

It is an arithmetic number, because the mean of its divisors is an integer number (2096820).

Almost surely, 2^20945042 is an apocalyptic number.

20945042 is a deficient number, since it is larger than the sum of its proper divisors (12604078).

20945042 is a wasteful number, since it uses less digits than its factorization.

20945042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10657.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20945042 is about 4576.5753571858. The cubic root of 20945042 is about 275.6515328485.

Adding to 20945042 its reverse (24054902), we get a palindrome (44999944).

The spelling of 20945042 in words is "twenty million, nine hundred forty-five thousand, forty-two".