21146542110046 has 16 divisors (see below), whose sum is σ = 31736716704000. Its totient is φ = 10567636840728.

The previous prime is 21146542110019. The next prime is 21146542110059. The reversal of 21146542110046 is 64001124564112.

It is a junction number, because it is equal to n+sod(n) for n = 21146542109987 and 21146542110014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254849761 + ... + 254932723.

It is an arithmetic number, because the mean of its divisors is an integer number (1983544794000).

Almost surely, 2^{21146542110046} is an apocalyptic number.

21146542110046 is a deficient number, since it is larger than the sum of its proper divisors (10590174593954).

21146542110046 is a wasteful number, since it uses less digits than its factorization.

21146542110046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149343.

The product of its (nonzero) digits is 46080, while the sum is 37.

Adding to 21146542110046 its reverse (64001124564112), we get a palindrome (85147666674158).

The spelling of 21146542110046 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-two million, one hundred ten thousand, forty-six".