19463773081481 has 6 divisors (see below), whose sum is σ = 19758613043610. Its totient is φ = 19173269001216.

The previous prime is 19463773081411. The next prime is 19463773081499. The reversal of 19463773081481 is 18418037736491.

It can be written as a sum of positive squares in only one way, i.e., 19141500010000 + 322273071481 = 4375100^2 + 567691^2 .

It is not a de Polignac number, because 19463773081481 - 2²² = 19463768887177 is a prime.

It is a super-2 number, since 2×19463773081481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19463773081411) 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, 2167936376 + ... + 2167945353.

It is an arithmetic number, because the mean of its divisors is an integer number (3293102173935).

Almost surely, 2^{19463773081481} is an apocalyptic number.

It is an amenable number.

19463773081481 is a deficient number, since it is larger than the sum of its proper divisors (294839962129).

19463773081481 is an frugal number, since it uses more digits than its factorization.

19463773081481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335881863 (or 4335881796 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 19463773081481 in words is "nineteen trillion, four hundred sixty-three billion, seven hundred seventy-three million, eighty-one thousand, four hundred eighty-one".