19860874542 has 28 divisors (see below), whose sum is σ = 44666538000. Its totient is φ = 6620291028.

The previous prime is 19860874531. The next prime is 19860874559. The reversal of 19860874542 is 24547806891.

It is a happy number.

19860874542 is a `hidden beast` number, since 1 + 98 + 6 + 0 + 8 + 7 + 4 + 542 = 666.

It is a super-3 number, since 3×19860874542³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 6809542 + ... + 6812457.

It is an arithmetic number, because the mean of its divisors is an integer number (1595233500).

Almost surely, 2^19860874542 is an apocalyptic number.

19860874542 is an abundant number, since it is smaller than the sum of its proper divisors (24805663458).

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

19860874542 is an equidigital number, since it uses as much as digits as its factorization.

19860874542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13622019 (or 13622004 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 19860874542 in words is "nineteen billion, eight hundred sixty million, eight hundred seventy-four thousand, five hundred forty-two".