27820900042 has 8 divisors (see below), whose sum is σ = 44941453956. Its totient is φ = 12840415392.

The previous prime is 27820900033. The next prime is 27820900057. The reversal of 27820900042 is 24000902872.

It can be written as a sum of positive squares in 2 ways, for example, as 27625431681 + 195468361 = 166209^2 + 13981^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 27820899980 and 27820900007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535017283 + ... + 535017334.

Almost surely, 2^27820900042 is an apocalyptic number.

27820900042 is a deficient number, since it is larger than the sum of its proper divisors (17120553914).

27820900042 is a wasteful number, since it uses less digits than its factorization.

27820900042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070034632.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 27820900042 in words is "twenty-seven billion, eight hundred twenty million, nine hundred thousand, forty-two".