20453146403 has 4 divisors (see below), whose sum is σ = 21656272680. Its totient is φ = 19250020128.

The previous prime is 20453146379. The next prime is 20453146423. The reversal of 20453146403 is 30464135402.

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 20453146403 - 2²⁸ = 20184710947 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 20453146403.

It is not an unprimeable number, because it can be changed into a prime (20453146423) 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 3 ways as a sum of consecutive naturals, for example, 601563113 + ... + 601563146.

It is an arithmetic number, because the mean of its divisors is an integer number (5414068170).

Almost surely, 2^20453146403 is an apocalyptic number.

20453146403 is a deficient number, since it is larger than the sum of its proper divisors (1203126277).

20453146403 is a wasteful number, since it uses less digits than its factorization.

20453146403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203126276.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 20453146403 in words is "twenty billion, four hundred fifty-three million, one hundred forty-six thousand, four hundred three".