20475454037665 has 8 divisors (see below), whose sum is σ = 26804230740288. Its totient is φ = 14891239300080.

The previous prime is 20475454037639. The next prime is 20475454037741. The reversal of 20475454037665 is 56673045457402.

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

It is not a de Polignac number, because 20475454037665 - 2⁹ = 20475454037153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186140491197 + ... + 186140491306.

It is an arithmetic number, because the mean of its divisors is an integer number (3350528842536).

Almost surely, 2^{20475454037665} is an apocalyptic number.

It is an amenable number.

20475454037665 is a deficient number, since it is larger than the sum of its proper divisors (6328776702623).

20475454037665 is a wasteful number, since it uses less digits than its factorization.

20475454037665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372280982519.

The product of its (nonzero) digits is 84672000, while the sum is 58.

The spelling of 20475454037665 in words is "twenty trillion, four hundred seventy-five billion, four hundred fifty-four million, thirty-seven thousand, six hundred sixty-five".