19782437406 has 32 divisors (see below), whose sum is σ = 40975956000. Its totient is φ = 6359485440.

The previous prime is 19782437399. The next prime is 19782437407. The reversal of 19782437406 is 60473428791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19782437407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88770 + ... + 217818.

It is an arithmetic number, because the mean of its divisors is an integer number (1280498625).

Almost surely, 2^19782437406 is an apocalyptic number.

19782437406 is an abundant number, since it is smaller than the sum of its proper divisors (21193518594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19782437406 is a wasteful number, since it uses less digits than its factorization.

19782437406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129964.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 19782437406 in words is "nineteen billion, seven hundred eighty-two million, four hundred thirty-seven thousand, four hundred six".