20480758739 has 4 divisors (see below), whose sum is σ = 23406581424. Its totient is φ = 17554936056.

The previous prime is 20480758643. The next prime is 20480758757. The reversal of 20480758739 is 93785708402.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-20480758739 is a prime.

It is a super-2 number, since 2×20480758739² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20480758439) 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, 1462911332 + ... + 1462911345.

It is an arithmetic number, because the mean of its divisors is an integer number (5851645356).

Almost surely, 2^20480758739 is an apocalyptic number.

20480758739 is a deficient number, since it is larger than the sum of its proper divisors (2925822685).

20480758739 is an equidigital number, since it uses as much as digits as its factorization.

20480758739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925822684.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 20480758739 in words is "twenty billion, four hundred eighty million, seven hundred fifty-eight thousand, seven hundred thirty-nine".