20044510523 has 4 divisors (see below), whose sum is σ = 20046021888. Its totient is φ = 20042999160.

The previous prime is 20044510517. The next prime is 20044510529. The reversal of 20044510523 is 32501544002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32501544002 = 2 ⋅16250772001.

It is an interprime number because it is at equal distance from previous prime (20044510517) and next prime (20044510529).

It is a cyclic number.

It is not a de Polignac number, because 20044510523 - 2²⁰ = 20043461947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20044510492 and 20044510501.

It is not an unprimeable number, because it can be changed into a prime (20044510529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735611 + ... + 762372.

It is an arithmetic number, because the mean of its divisors is an integer number (5011505472).

Almost surely, 2^20044510523 is an apocalyptic number.

20044510523 is a deficient number, since it is larger than the sum of its proper divisors (1511365).

20044510523 is a wasteful number, since it uses less digits than its factorization.

20044510523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511364.

The product of its (nonzero) digits is 4800, while the sum is 26.

The spelling of 20044510523 in words is "twenty billion, forty-four million, five hundred ten thousand, five hundred twenty-three".