20453450523 has 32 divisors (see below), whose sum is σ = 30149591040. Its totient is φ = 12229969440.

The previous prime is 20453450519. The next prime is 20453450551. The reversal of 20453450523 is 32505435402.

It is a happy number.

It is not a de Polignac number, because 20453450523 - 2² = 20453450519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20453450123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5376340 + ... + 5380142.

It is an arithmetic number, because the mean of its divisors is an integer number (942174720).

Almost surely, 2^20453450523 is an apocalyptic number.

20453450523 is a deficient number, since it is larger than the sum of its proper divisors (9696140517).

20453450523 is a wasteful number, since it uses less digits than its factorization.

20453450523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959.

The product of its (nonzero) digits is 72000, while the sum is 33.

Adding to 20453450523 its reverse (32505435402), we get a palindrome (52958885925).

The spelling of 20453450523 in words is "twenty billion, four hundred fifty-three million, four hundred fifty thousand, five hundred twenty-three".