21455151445142 has 8 divisors (see below), whose sum is σ = 32182816336632. Its totient is φ = 10727545999600.

The previous prime is 21455151445099. The next prime is 21455151445159. The reversal of 21455151445142 is 24154415155412.

It is a happy number.

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 = 21455151445093 and 21455151445102.

It is a congruent number.

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, 13947959 + ... + 15409602.

It is an arithmetic number, because the mean of its divisors is an integer number (4022852042079).

Almost surely, 2^{21455151445142} is an apocalyptic number.

21455151445142 is a deficient number, since it is larger than the sum of its proper divisors (10727664891490).

21455151445142 is a wasteful number, since it uses less digits than its factorization.

21455151445142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29722974.

The product of its digits is 640000, while the sum is 44.

The spelling of 21455151445142 in words is "twenty-one trillion, four hundred fifty-five billion, one hundred fifty-one million, four hundred forty-five thousand, one hundred forty-two".