19802838195 has 288 divisors, whose sum is σ = 44743974912. Its totient is φ = 8034453504.

The previous prime is 19802838169. The next prime is 19802838257. The reversal of 19802838195 is 59183820891.

It is not a de Polignac number, because 19802838195 - 2¹⁸ = 19802576051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 88801854 + ... + 88802076.

It is an arithmetic number, because the mean of its divisors is an integer number (155361024).

Almost surely, 2^19802838195 is an apocalyptic number.

19802838195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19802838195 is an abundant number, since it is smaller than the sum of its proper divisors (24941136717).

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

19802838195 is a wasteful number, since it uses less digits than its factorization.

19802838195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 19802838195 in words is "nineteen billion, eight hundred two million, eight hundred thirty-eight thousand, one hundred ninety-five".