19132681 has 4 divisors (see below), whose sum is σ = 19278864. Its totient is φ = 18986500.

The previous prime is 19132651. The next prime is 19132693. The reversal of 19132681 is 18623191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19132681 is a prime.

It is a super-2 number, since 2×19132681² = 732118964495522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19132651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72895 + ... + 73156.

It is an arithmetic number, because the mean of its divisors is an integer number (4819716).

Almost surely, 2^19132681 is an apocalyptic number.

It is an amenable number.

19132681 is a deficient number, since it is larger than the sum of its proper divisors (146183).

19132681 is a wasteful number, since it uses less digits than its factorization.

19132681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146182.

The product of its digits is 2592, while the sum is 31.

The square root of 19132681 is about 4374.0920200654. The cubic root of 19132681 is about 267.4598583024.

The spelling of 19132681 in words is "nineteen million, one hundred thirty-two thousand, six hundred eighty-one".