20706748187 has 8 divisors (see below), whose sum is σ = 21941338176. Its totient is φ = 19473996672.

The previous prime is 20706748157. The next prime is 20706748201. The reversal of 20706748187 is 78184760702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20706748187 - 2²⁴ = 20689970971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20706748157) 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, 436388 + ... + 481505.

It is an arithmetic number, because the mean of its divisors is an integer number (2742667272).

Almost surely, 2^20706748187 is an apocalyptic number.

20706748187 is a deficient number, since it is larger than the sum of its proper divisors (1234589989).

20706748187 is a wasteful number, since it uses less digits than its factorization.

20706748187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919237.

The product of its (nonzero) digits is 1053696, while the sum is 50.

The spelling of 20706748187 in words is "twenty billion, seven hundred six million, seven hundred forty-eight thousand, one hundred eighty-seven".