19985279442 has 16 divisors (see below), whose sum is σ = 39977400960. Its totient is φ = 6660619472.

The previous prime is 19985279359. The next prime is 19985279467. The reversal of 19985279442 is 24497258991.

It is a super-2 number, since 2×19985279442² (a number of 21 digits) contains 22 as substring.

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, 246717 + ... + 317552.

It is an arithmetic number, because the mean of its divisors is an integer number (2498587560).

Almost surely, 2^19985279442 is an apocalyptic number.

19985279442 is an abundant number, since it is smaller than the sum of its proper divisors (19992121518).

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

19985279442 is a wasteful number, since it uses less digits than its factorization.

19985279442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570177.

The product of its digits is 13063680, while the sum is 60.

The spelling of 19985279442 in words is "nineteen billion, nine hundred eighty-five million, two hundred seventy-nine thousand, four hundred forty-two".