19961411 has 8 divisors (see below), whose sum is σ = 20416560. Its totient is φ = 19510272.

The previous prime is 19961393. The next prime is 19961413. The reversal of 19961411 is 11416991.

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

It is a cyclic number.

It is not a de Polignac number, because 19961411 - 2¹⁴ = 19945027 is a prime.

It is a super-2 number, since 2×19961411² = 796915858221842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19961413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10511 + ... + 12263.

It is an arithmetic number, because the mean of its divisors is an integer number (2552070).

Almost surely, 2^19961411 is an apocalyptic number.

19961411 is a deficient number, since it is larger than the sum of its proper divisors (455149).

19961411 is a wasteful number, since it uses less digits than its factorization.

19961411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005.

The product of its digits is 1944, while the sum is 32.

The square root of 19961411 is about 4467.8194905345. The cubic root of 19961411 is about 271.2670714903.

The spelling of 19961411 in words is "nineteen million, nine hundred sixty-one thousand, four hundred eleven".