20520044 has 12 divisors (see below), whose sum is σ = 36025584. Its totient is φ = 10227024.

The previous prime is 20520043. The next prime is 20520053. The reversal of 20520044 is 44002502.

It is not an unprimeable number, because it can be changed into a prime (20520041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6824 + ... + 9359.

It is an arithmetic number, because the mean of its divisors is an integer number (3002132).

Almost surely, 2^20520044 is an apocalyptic number.

It is an amenable number.

20520044 is a deficient number, since it is larger than the sum of its proper divisors (15505540).

20520044 is a wasteful number, since it uses less digits than its factorization.

20520044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16504 (or 16502 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20520044 is about 4529.9055177785. The cubic root of 20520044 is about 273.7743538031.

Adding to 20520044 its reverse (44002502), we get a palindrome (64522546).

The spelling of 20520044 in words is "twenty million, five hundred twenty thousand, forty-four".