19401941 has 4 divisors (see below), whose sum is σ = 20894412. Its totient is φ = 17909472.

The previous prime is 19401937. The next prime is 19401961. The reversal of 19401941 is 14910491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14910491 = 2347 ⋅6353.

It can be written as a sum of positive squares in 2 ways, for example, as 8702500 + 10699441 = 2950^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 19401941 - 2² = 19401937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19401961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746216 + ... + 746241.

It is an arithmetic number, because the mean of its divisors is an integer number (5223603).

Almost surely, 2^19401941 is an apocalyptic number.

It is an amenable number.

19401941 is a deficient number, since it is larger than the sum of its proper divisors (1492471).

19401941 is a wasteful number, since it uses less digits than its factorization.

19401941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492470.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 19401941 is about 4404.7634442726. The cubic root of 19401941 is about 268.7086991878.

The spelling of 19401941 in words is "nineteen million, four hundred one thousand, nine hundred forty-one".