20504232453 has 8 divisors (see below), whose sum is σ = 27340215616. Its totient is φ = 13668868800.

The previous prime is 20504232439. The next prime is 20504232461. The reversal of 20504232453 is 35423240502.

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

It is not a de Polignac number, because 20504232453 - 2⁹ = 20504231941 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 20504232453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504232493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71188 + ... + 214653.

It is an arithmetic number, because the mean of its divisors is an integer number (3417526952).

Almost surely, 2^20504232453 is an apocalyptic number.

It is an amenable number.

20504232453 is a deficient number, since it is larger than the sum of its proper divisors (6835983163).

20504232453 is a wasteful number, since it uses less digits than its factorization.

20504232453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309755.

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 20504232453 its reverse (35423240502), we get a palindrome (55927472955).

The spelling of 20504232453 in words is "twenty billion, five hundred four million, two hundred thirty-two thousand, four hundred fifty-three".