20451031006 has 16 divisors (see below), whose sum is σ = 35094818016. Its totient is φ = 8755750656.

The previous prime is 20451030973. The next prime is 20451031009. The reversal of 20451031006 is 60013015402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451031009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 733911 + ... + 761266.

It is an arithmetic number, because the mean of its divisors is an integer number (2193426126).

Almost surely, 2^20451031006 is an apocalyptic number.

20451031006 is a deficient number, since it is larger than the sum of its proper divisors (14643787010).

20451031006 is a wasteful number, since it uses less digits than its factorization.

20451031006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496163.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20451031006 its reverse (60013015402), we get a palindrome (80464046408).

The spelling of 20451031006 in words is "twenty billion, four hundred fifty-one million, thirty-one thousand, six".