19267938481 has 9 divisors (see below), whose sum is σ = 21180486873. Its totient is φ = 17514919620.

The previous prime is 19267938461. The next prime is 19267938509. The reversal of 19267938481 is 18483976291.

The square root of 19267938481 is 138809.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 19267938481 - 2⁵ = 19267938449 is a prime.

It is a super-2 number, since 2×19267938481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19267938461) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1520590 + ... + 1533208.

Almost surely, 2^19267938481 is an apocalyptic number.

19267938481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19267938481 is the 138809-th square number.

19267938481 is the 69405-th centered octagonal number.

It is an amenable number.

19267938481 is a deficient number, since it is larger than the sum of its proper divisors (1912548392).

19267938481 is an frugal number, since it uses more digits than its factorization.

19267938481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25260 (or 12630 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The spelling of 19267938481 in words is "nineteen billion, two hundred sixty-seven million, nine hundred thirty-eight thousand, four hundred eighty-one".