19782437398 has 8 divisors (see below), whose sum is σ = 29702219040. Its totient is φ = 9881697720.

The previous prime is 19782437351. The next prime is 19782437399. The reversal of 19782437398 is 89373428791.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19782437399) 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, 4757893 + ... + 4762048.

It is an arithmetic number, because the mean of its divisors is an integer number (3712777380).

Almost surely, 2^19782437398 is an apocalyptic number.

19782437398 is a deficient number, since it is larger than the sum of its proper divisors (9919781642).

19782437398 is a wasteful number, since it uses less digits than its factorization.

19782437398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520982.

The product of its digits is 18289152, while the sum is 61.

The spelling of 19782437398 in words is "nineteen billion, seven hundred eighty-two million, four hundred thirty-seven thousand, three hundred ninety-eight".