20127453747 has 8 divisors (see below), whose sum is σ = 26837879040. Its totient is φ = 13417665480.

The previous prime is 20127453733. The next prime is 20127453757. The reversal of 20127453747 is 74735472102.

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

It is a de Polignac number, because none of the positive numbers 2^k-20127453747 is a prime.

It is a super-2 number, since 2×20127453747² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20127453699 and 20127453708.

It is not an unprimeable number, because it can be changed into a prime (20127453727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79879 + ... + 215952.

It is an arithmetic number, because the mean of its divisors is an integer number (3354734880).

Almost surely, 2^20127453747 is an apocalyptic number.

20127453747 is a deficient number, since it is larger than the sum of its proper divisors (6710425293).

20127453747 is a wasteful number, since it uses less digits than its factorization.

20127453747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318513.

The product of its (nonzero) digits is 329280, while the sum is 42.

The spelling of 20127453747 in words is "twenty billion, one hundred twenty-seven million, four hundred fifty-three thousand, seven hundred forty-seven".