20351464523 has 6 divisors (see below), whose sum is σ = 22037384844. Its totient is φ = 18785967096.

The previous prime is 20351464517. The next prime is 20351464559. The reversal of 20351464523 is 32546415302.

It is not a de Polignac number, because 20351464523 - 2¹⁰ = 20351463499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20351464723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60211265 + ... + 60211602.

It is an arithmetic number, because the mean of its divisors is an integer number (3672897474).

Almost surely, 2^20351464523 is an apocalyptic number.

20351464523 is a deficient number, since it is larger than the sum of its proper divisors (1685920321).

20351464523 is a wasteful number, since it uses less digits than its factorization.

20351464523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120422893 (or 120422880 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 20351464523 its reverse (32546415302), we get a palindrome (52897879825).

The spelling of 20351464523 in words is "twenty billion, three hundred fifty-one million, four hundred sixty-four thousand, five hundred twenty-three".