20647232071 has 8 divisors (see below), whose sum is σ = 21890516544. Its totient is φ = 19407141120.

The previous prime is 20647232069. The next prime is 20647232077. The reversal of 20647232071 is 17023274602.

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 20647232071 - 2¹ = 20647232069 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 (20647232077) 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, 785055 + ... + 810928.

It is an arithmetic number, because the mean of its divisors is an integer number (2736314568).

Almost surely, 2^20647232071 is an apocalyptic number.

20647232071 is a deficient number, since it is larger than the sum of its proper divisors (1243284473).

20647232071 is a wasteful number, since it uses less digits than its factorization.

20647232071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596761.

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 20647232071 in words is "twenty billion, six hundred forty-seven million, two hundred thirty-two thousand, seventy-one".