20051252051651 has 8 divisors (see below), whose sum is σ = 21590580475440. Its totient is φ = 18551906184448.

The previous prime is 20051252051629. The next prime is 20051252051671. The reversal of 20051252051651 is 15615025215002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20051252051651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20051252051671) 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, 9995638106 + ... + 9995640111.

It is an arithmetic number, because the mean of its divisors is an integer number (2698822559430).

Almost surely, 2^{20051252051651} is an apocalyptic number.

20051252051651 is a deficient number, since it is larger than the sum of its proper divisors (1539328423789).

20051252051651 is a wasteful number, since it uses less digits than its factorization.

20051252051651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19991278293.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 20051252051651 its reverse (15615025215002), we get a palindrome (35666277266653).

The spelling of 20051252051651 in words is "twenty trillion, fifty-one billion, two hundred fifty-two million, fifty-one thousand, six hundred fifty-one".