19782437411 has 4 divisors (see below), whose sum is σ = 21580840824. Its totient is φ = 17984034000.

The previous prime is 19782437407. The next prime is 19782437429. The reversal of 19782437411 is 11473428791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11473428791 = 11 ⋅1043038981.

It is a cyclic number.

It is not a de Polignac number, because 19782437411 - 2² = 19782437407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19782437491) 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, 899201690 + ... + 899201711.

It is an arithmetic number, because the mean of its divisors is an integer number (5395210206).

Almost surely, 2^19782437411 is an apocalyptic number.

19782437411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19782437411 is a deficient number, since it is larger than the sum of its proper divisors (1798403413).

19782437411 is a wasteful number, since it uses less digits than its factorization.

19782437411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798403412.

The product of its digits is 338688, while the sum is 47.

The spelling of 19782437411 in words is "nineteen billion, seven hundred eighty-two million, four hundred thirty-seven thousand, four hundred eleven".