20327730637 has 8 divisors (see below), whose sum is σ = 21724635456. Its totient is φ = 18953176512.

The previous prime is 20327730581. The next prime is 20327730649. The reversal of 20327730637 is 73603772302.

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

It is not a de Polignac number, because 20327730637 - 2⁷ = 20327730509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20327730637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20327730737) 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, 5585793 + ... + 5589430.

It is an arithmetic number, because the mean of its divisors is an integer number (2715579432).

Almost surely, 2^20327730637 is an apocalyptic number.

It is an amenable number.

20327730637 is a deficient number, since it is larger than the sum of its proper divisors (1396904819).

20327730637 is a wasteful number, since it uses less digits than its factorization.

20327730637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11175347.

The product of its (nonzero) digits is 222264, while the sum is 40.

The spelling of 20327730637 in words is "twenty billion, three hundred twenty-seven million, seven hundred thirty thousand, six hundred thirty-seven".