20507043523 has 8 divisors (see below), whose sum is σ = 21285520256. Its totient is φ = 19735876800.

The previous prime is 20507043517. The next prime is 20507043533. The reversal of 20507043523 is 32534070502.

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 20507043523 - 2¹⁷ = 20506912451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20507043533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821786 + ... + 1833007.

It is an arithmetic number, because the mean of its divisors is an integer number (2660690032).

Almost surely, 2^20507043523 is an apocalyptic number.

20507043523 is a deficient number, since it is larger than the sum of its proper divisors (778476733).

20507043523 is a wasteful number, since it uses less digits than its factorization.

20507043523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655005.

The product of its (nonzero) digits is 25200, while the sum is 31.

The spelling of 20507043523 in words is "twenty billion, five hundred seven million, forty-three thousand, five hundred twenty-three".