47185870042 has 4 divisors (see below), whose sum is σ = 70778805066. Its totient is φ = 23592935020.

The previous prime is 47185870037. The next prime is 47185870091. The reversal of 47185870042 is 24007858174.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24007858174 = 2 ⋅12003929087.

It can be written as a sum of positive squares in only one way, i.e., 45105689161 + 2080180881 = 212381^2 + 45609^2 .

It is a junction number, because it is equal to n+sod(n) for n = 47185869974 and 47185870001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11796467509 + ... + 11796467512.

Almost surely, 2^47185870042 is an apocalyptic number.

47185870042 is a deficient number, since it is larger than the sum of its proper divisors (23592935024).

47185870042 is a wasteful number, since it uses less digits than its factorization.

47185870042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23592935023.

The product of its (nonzero) digits is 501760, while the sum is 46.

The spelling of 47185870042 in words is "forty-seven billion, one hundred eighty-five million, eight hundred seventy thousand, forty-two".