21471079042 has 8 divisors (see below), whose sum is σ = 36807564096. Its totient is φ = 9201891012.

The previous prime is 21471079013. The next prime is 21471079057. The reversal of 21471079042 is 24097017412.

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

It is a super-2 number, since 2×21471079042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21471078992 and 21471079010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766824238 + ... + 766824265.

It is an arithmetic number, because the mean of its divisors is an integer number (4600945512).

Almost surely, 2^21471079042 is an apocalyptic number.

21471079042 is a deficient number, since it is larger than the sum of its proper divisors (15336485054).

21471079042 is a wasteful number, since it uses less digits than its factorization.

21471079042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533648512.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 21471079042 in words is "twenty-one billion, four hundred seventy-one million, seventy-nine thousand, forty-two".