20747912983 has 8 divisors (see below), whose sum is σ = 23727901568. Its totient is φ = 17771924664.

The previous prime is 20747912963. The next prime is 20747912987. The reversal of 20747912983 is 38921974702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20747912983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20747912983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20747912987) 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, 988941 + ... + 1009702.

It is an arithmetic number, because the mean of its divisors is an integer number (2965987696).

Almost surely, 2^20747912983 is an apocalyptic number.

20747912983 is a deficient number, since it is larger than the sum of its proper divisors (2979988585).

20747912983 is a wasteful number, since it uses less digits than its factorization.

20747912983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000133.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 20747912983 in words is "twenty billion, seven hundred forty-seven million, nine hundred twelve thousand, nine hundred eighty-three".