19356240016 has 10 divisors (see below), whose sum is σ = 37502715062. Its totient is φ = 9678120000.

The previous prime is 19356240011. The next prime is 19356240017. The reversal of 19356240016 is 61004265391.

It can be written as a sum of positive squares in only one way, i.e., 15450490000 + 3905750016 = 124300^2 + 62496^2 .

It is not an unprimeable number, because it can be changed into a prime (19356240011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604882485 + ... + 604882516.

Almost surely, 2^19356240016 is an apocalyptic number.

19356240016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19356240016 is a deficient number, since it is larger than the sum of its proper divisors (18146475046).

19356240016 is a wasteful number, since it uses less digits than its factorization.

19356240016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209765009 (or 1209765003 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 19356240016 in words is "nineteen billion, three hundred fifty-six million, two hundred forty thousand, sixteen".