20010506 has 16 divisors (see below), whose sum is σ = 31472064. Its totient is φ = 9524064.

The previous prime is 20010491. The next prime is 20010517. The reversal of 20010506 is 60501002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9785 + ... + 11651.

It is an arithmetic number, because the mean of its divisors is an integer number (1967004).

Almost surely, 2^20010506 is an apocalyptic number.

20010506 is a deficient number, since it is larger than the sum of its proper divisors (11461558).

20010506 is a wasteful number, since it uses less digits than its factorization.

20010506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20010506 is about 4473.3104072935. The cubic root of 20010506 is about 271.4892827920.

Adding to 20010506 its reverse (60501002), we get a palindrome (80511508).

The spelling of 20010506 in words is "twenty million, ten thousand, five hundred six".