20125534503 has 4 divisors (see below), whose sum is σ = 26834046008. Its totient is φ = 13417023000.

The previous prime is 20125534501. The next prime is 20125534549. The reversal of 20125534503 is 30543552102.

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

It is not a de Polignac number, because 20125534503 - 2¹ = 20125534501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125534501) 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, 3354255748 + ... + 3354255753.

It is an arithmetic number, because the mean of its divisors is an integer number (6708511502).

Almost surely, 2^20125534503 is an apocalyptic number.

20125534503 is a deficient number, since it is larger than the sum of its proper divisors (6708511505).

20125534503 is an equidigital number, since it uses as much as digits as its factorization.

20125534503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708511504.

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 20125534503 in words is "twenty billion, one hundred twenty-five million, five hundred thirty-four thousand, five hundred three".