20462144517 has 6 divisors (see below), whose sum is σ = 29556430982. Its totient is φ = 13641429672.

The previous prime is 20462144501. The next prime is 20462144609. The reversal of 20462144517 is 71544126402.

20462144517 is a `hidden beast` number, since 2 + 0 + 462 + 144 + 51 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20368712961 + 93431556 = 142719^2 + 9666^2 .

It is not a de Polignac number, because 20462144517 - 2⁴ = 20462144501 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 (20462144317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136785798 + ... + 1136785815.

Almost surely, 2^20462144517 is an apocalyptic number.

It is an amenable number.

20462144517 is a deficient number, since it is larger than the sum of its proper divisors (9094286465).

20462144517 is a wasteful number, since it uses less digits than its factorization.

20462144517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273571619 (or 2273571616 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 20462144517 in words is "twenty billion, four hundred sixty-two million, one hundred forty-four thousand, five hundred seventeen".