20131524047 has 4 divisors (see below), whose sum is σ = 20278469616. Its totient is φ = 19984578480.

The previous prime is 20131524041. The next prime is 20131524059. The reversal of 20131524047 is 74042513102.

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

It is a cyclic number.

It is not a de Polignac number, because 20131524047 - 2¹² = 20131519951 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 (20131524041) 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, 73472579 + ... + 73472852.

It is an arithmetic number, because the mean of its divisors is an integer number (5069617404).

Almost surely, 2^20131524047 is an apocalyptic number.

20131524047 is a deficient number, since it is larger than the sum of its proper divisors (146945569).

20131524047 is a wasteful number, since it uses less digits than its factorization.

20131524047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146945568.

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 20131524047 in words is "twenty billion, one hundred thirty-one million, five hundred twenty-four thousand, forty-seven".