19701323442 has 32 divisors (see below), whose sum is σ = 44114938560. Its totient is φ = 6516974880.

The previous prime is 19701323441. The next prime is 19701323461. The reversal of 19701323442 is 24432310791.

It is a happy number.

19701323442 is a `hidden beast` number, since 19 + 70 + 132 + 3 + 442 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19701323397 and 19701323406.

It is not an unprimeable number, because it can be changed into a prime (19701323441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385443 + ... + 1399590.

It is an arithmetic number, because the mean of its divisors is an integer number (1378591830).

Almost surely, 2^19701323442 is an apocalyptic number.

19701323442 is an abundant number, since it is smaller than the sum of its proper divisors (24413615118).

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

19701323442 is a wasteful number, since it uses less digits than its factorization.

19701323442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785175 (or 2785169 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 19701323442 in words is "nineteen billion, seven hundred one million, three hundred twenty-three thousand, four hundred forty-two".