19878042235 has 8 divisors (see below), whose sum is σ = 23869875456. Its totient is φ = 15891617280.

The previous prime is 19878042229. The next prime is 19878042271. The reversal of 19878042235 is 53224087891.

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

It is not a de Polignac number, because 19878042235 - 2³³ = 11288107643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1343974 + ... + 1358683.

It is an arithmetic number, because the mean of its divisors is an integer number (2983734432).

Almost surely, 2^19878042235 is an apocalyptic number.

19878042235 is a deficient number, since it is larger than the sum of its proper divisors (3991833221).

19878042235 is a wasteful number, since it uses less digits than its factorization.

19878042235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704133.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 19878042235 in words is "nineteen billion, eight hundred seventy-eight million, forty-two thousand, two hundred thirty-five".