19697841 has 12 divisors (see below), whose sum is σ = 29058432. Its totient is φ = 12852216.

The previous prime is 19697837. The next prime is 19697857. The reversal of 19697841 is 14879691.

It is a happy number.

It is not a de Polignac number, because 19697841 - 2² = 19697837 is a prime.

It is a super-2 number, since 2×19697841² = 776009880122562, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19697831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22861 + ... + 23706.

It is an arithmetic number, because the mean of its divisors is an integer number (2421536).

Almost surely, 2^19697841 is an apocalyptic number.

It is an amenable number.

19697841 is a deficient number, since it is larger than the sum of its proper divisors (9360591).

19697841 is a wasteful number, since it uses less digits than its factorization.

19697841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46620 (or 46617 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 19697841 is about 4438.2249830309. The cubic root of 19697841 is about 270.0678430339.

The spelling of 19697841 in words is "nineteen million, six hundred ninety-seven thousand, eight hundred forty-one".