20247436471511 has 8 divisors (see below), whose sum is σ = 20321158419024. Its totient is φ = 20173802869440.

The previous prime is 20247436471403. The next prime is 20247436471523. The reversal of 20247436471511 is 11517463474202.

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-20247436471511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247436471811) 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, 21627140 + ... + 22543913.

It is an arithmetic number, because the mean of its divisors is an integer number (2540144802378).

Almost surely, 2^{20247436471511} is an apocalyptic number.

20247436471511 is a deficient number, since it is larger than the sum of its proper divisors (73721947513).

20247436471511 is a wasteful number, since it uses less digits than its factorization.

20247436471511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44172721.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 20247436471511 in words is "twenty trillion, two hundred forty-seven billion, four hundred thirty-six million, four hundred seventy-one thousand, five hundred eleven".