20233257511 has 4 divisors (see below), whose sum is σ = 20322391032. Its totient is φ = 20144123992.

The previous prime is 20233257497. The next prime is 20233257553. The reversal of 20233257511 is 11575233202.

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 20233257511 - 2⁷ = 20233257383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203257511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44566420 + ... + 44566873.

It is an arithmetic number, because the mean of its divisors is an integer number (5080597758).

Almost surely, 2^20233257511 is an apocalyptic number.

20233257511 is a deficient number, since it is larger than the sum of its proper divisors (89133521).

20233257511 is an equidigital number, since it uses as much as digits as its factorization.

20233257511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89133520.

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 20233257511 in words is "twenty billion, two hundred thirty-three million, two hundred fifty-seven thousand, five hundred eleven".