20147577505457 has 8 divisors (see below), whose sum is σ = 20150388350400. Its totient is φ = 20144766867984.

The previous prime is 20147577505423. The next prime is 20147577505469. The reversal of 20147577505457 is 75450577574102.

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

It is a cyclic number.

It is not a de Polignac number, because 20147577505457 - 2³⁴ = 20130397636273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20147577505396 and 20147577505405.

It is not an unprimeable number, because it can be changed into a prime (20147577505417) 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, 307380794 + ... + 307446332.

It is an arithmetic number, because the mean of its divisors is an integer number (2518798543800).

Almost surely, 2^{20147577505457} is an apocalyptic number.

It is an amenable number.

20147577505457 is a deficient number, since it is larger than the sum of its proper divisors (2810844943).

20147577505457 is a wasteful number, since it uses less digits than its factorization.

20147577505457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103735.

The product of its (nonzero) digits is 48020000, while the sum is 59.

The spelling of 20147577505457 in words is "twenty trillion, one hundred forty-seven billion, five hundred seventy-seven million, five hundred five thousand, four hundred fifty-seven".