20933527187 has 4 divisors (see below), whose sum is σ = 21129167736. Its totient is φ = 20737886640.

The previous prime is 20933527177. The next prime is 20933527213. The reversal of 20933527187 is 78172533902.

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 20933527187 - 2⁴ = 20933527171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20933527117) 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, 97820114 + ... + 97820327.

It is an arithmetic number, because the mean of its divisors is an integer number (5282291934).

Almost surely, 2^20933527187 is an apocalyptic number.

20933527187 is a deficient number, since it is larger than the sum of its proper divisors (195640549).

20933527187 is a wasteful number, since it uses less digits than its factorization.

20933527187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195640548.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 20933527187 in words is "twenty billion, nine hundred thirty-three million, five hundred twenty-seven thousand, one hundred eighty-seven".