20051006 has 8 divisors (see below), whose sum is σ = 31113720. Its totient is φ = 9679768.

The previous prime is 20050981. The next prime is 20051047. The reversal of 20051006 is 60015002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20051006² = 804085683224072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172796 + ... + 172911.

It is an arithmetic number, because the mean of its divisors is an integer number (3889215).

Almost surely, 2^20051006 is an apocalyptic number.

20051006 is a deficient number, since it is larger than the sum of its proper divisors (11062714).

20051006 is a wasteful number, since it uses less digits than its factorization.

20051006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345738.

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

The square root of 20051006 is about 4477.8349679281. The cubic root of 20051006 is about 271.6723184157.

Adding to 20051006 its reverse (60015002), we get a palindrome (80066008).

The spelling of 20051006 in words is "twenty million, fifty-one thousand, six".