20503157023 has 8 divisors (see below), whose sum is σ = 21371586992. Its totient is φ = 19651268736.

The previous prime is 20503157021. The next prime is 20503157033. The reversal of 20503157023 is 32075130502.

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

It is a cyclic number.

It is not a de Polignac number, because 20503157023 - 2¹ = 20503157021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20503156982 and 20503157000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503157021) 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 7 ways as a sum of consecutive naturals, for example, 4132890 + ... + 4137847.

It is an arithmetic number, because the mean of its divisors is an integer number (2671448374).

Almost surely, 2^20503157023 is an apocalyptic number.

20503157023 is a deficient number, since it is larger than the sum of its proper divisors (868429969).

20503157023 is an equidigital number, since it uses as much as digits as its factorization.

20503157023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8270841.

The product of its (nonzero) digits is 6300, while the sum is 28.

Adding to 20503157023 its reverse (32075130502), we get a palindrome (52578287525).

The spelling of 20503157023 in words is "twenty billion, five hundred three million, one hundred fifty-seven thousand, twenty-three".