20512034023 has 4 divisors (see below), whose sum is σ = 22089882808. Its totient is φ = 18934185240.

The previous prime is 20512033981. The next prime is 20512034069. The reversal of 20512034023 is 32043021502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20512034023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20512033985 and 20512034003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512038023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788924373 + ... + 788924398.

It is an arithmetic number, because the mean of its divisors is an integer number (5522470702).

Almost surely, 2^20512034023 is an apocalyptic number.

20512034023 is a deficient number, since it is larger than the sum of its proper divisors (1577848785).

20512034023 is a wasteful number, since it uses less digits than its factorization.

20512034023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577848784.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20512034023 its reverse (32043021502), we get a palindrome (52555055525).

The spelling of 20512034023 in words is "twenty billion, five hundred twelve million, thirty-four thousand, twenty-three".