21500167442042 has 8 divisors (see below), whose sum is σ = 32316473446176. Its totient is φ = 10728009626652.

The previous prime is 21500167442023. The next prime is 21500167442057. The reversal of 21500167442042 is 24024476100512.

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 = 21500167441987 and 21500167442005.

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, 11037045968 + ... + 11037047915.

It is an arithmetic number, because the mean of its divisors is an integer number (4039559180772).

Almost surely, 2^{21500167442042} is an apocalyptic number.

21500167442042 is a deficient number, since it is larger than the sum of its proper divisors (10816306004134).

21500167442042 is a wasteful number, since it uses less digits than its factorization.

21500167442042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22074094372.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 21500167442042 in words is "twenty-one trillion, five hundred billion, one hundred sixty-seven million, four hundred forty-two thousand, forty-two".