20625051511 has 4 divisors (see below), whose sum is σ = 20632159152. Its totient is φ = 20617943872.

The previous prime is 20625051497. The next prime is 20625051527. The reversal of 20625051511 is 11515052602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20625051511 - 2⁷ = 20625051383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20625051511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625051571) 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, 3549466 + ... + 3555271.

It is an arithmetic number, because the mean of its divisors is an integer number (5158039788).

Almost surely, 2^20625051511 is an apocalyptic number.

20625051511 is a deficient number, since it is larger than the sum of its proper divisors (7107641).

20625051511 is an equidigital number, since it uses as much as digits as its factorization.

20625051511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107640.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 20625051511 in words is "twenty billion, six hundred twenty-five million, fifty-one thousand, five hundred eleven".