20623461503 has 4 divisors (see below), whose sum is σ = 20651597928. Its totient is φ = 20595325080.

The previous prime is 20623461473. The next prime is 20623461511. The reversal of 20623461503 is 30516432602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30516432602 = 2 ⋅15258216301.

It is a cyclic number.

It is not a de Polignac number, because 20623461503 - 2²⁶ = 20556352639 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 20623461503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623461533) 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, 14067113 + ... + 14068578.

It is an arithmetic number, because the mean of its divisors is an integer number (5162899482).

Almost surely, 2^20623461503 is an apocalyptic number.

20623461503 is a deficient number, since it is larger than the sum of its proper divisors (28136425).

20623461503 is an equidigital number, since it uses as much as digits as its factorization.

20623461503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28136424.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20623461503 in words is "twenty billion, six hundred twenty-three million, four hundred sixty-one thousand, five hundred three".