20457829861347 has 8 divisors (see below), whose sum is σ = 27374178036240. Its totient is φ = 13590017463680.

The previous prime is 20457829861211. The next prime is 20457829861393. The reversal of 20457829861347 is 74316892875402.

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-20457829861347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20457829811347) 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, 12133943322 + ... + 12133945007.

It is an arithmetic number, because the mean of its divisors is an integer number (3421772254530).

It is a 1-persistent number, because it is pandigital, but 2⋅20457829861347 = 40915659722694 is not.

Almost surely, 2^{20457829861347} is an apocalyptic number.

20457829861347 is a deficient number, since it is larger than the sum of its proper divisors (6916348174893).

20457829861347 is a wasteful number, since it uses less digits than its factorization.

20457829861347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24267888613.

The product of its (nonzero) digits is 162570240, while the sum is 66.

The spelling of 20457829861347 in words is "twenty trillion, four hundred fifty-seven billion, eight hundred twenty-nine million, eight hundred sixty-one thousand, three hundred forty-seven".