19797741 has 24 divisors (see below), whose sum is σ = 30663360. Its totient is φ = 12264576.

The previous prime is 19797727. The next prime is 19797781. The reversal of 19797741 is 14779791.

It is not a de Polignac number, because 19797741 - 2¹⁵ = 19764973 is a prime.

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 a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19797781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11920 + ... + 13478.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^19797741 is an apocalyptic number.

It is an amenable number.

19797741 is a deficient number, since it is larger than the sum of its proper divisors (10865619).

19797741 is a wasteful number, since it uses less digits than its factorization.

19797741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1662 counting only the distinct ones).

The product of its digits is 111132, while the sum is 45.

The square root of 19797741 is about 4449.4652487687. The cubic root of 19797741 is about 270.5236340212.

The spelling of 19797741 in words is "nineteen million, seven hundred ninety-seven thousand, seven hundred forty-one".