19802142735 has 16 divisors (see below), whose sum is σ = 31873153536. Its totient is φ = 10497901088.

The previous prime is 19802142709. The next prime is 19802142781. The reversal of 19802142735 is 53724120891.

It is a cyclic number.

It is not a de Polignac number, because 19802142735 - 2⁹ = 19802142223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3950019 + ... + 3955028.

It is an arithmetic number, because the mean of its divisors is an integer number (1992072096).

Almost surely, 2^19802142735 is an apocalyptic number.

19802142735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19802142735 is a deficient number, since it is larger than the sum of its proper divisors (12071010801).

19802142735 is a wasteful number, since it uses less digits than its factorization.

19802142735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7905222.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 19802142735 in words is "nineteen billion, eight hundred two million, one hundred forty-two thousand, seven hundred thirty-five".