21146543424142 has 16 divisors (see below), whose sum is σ = 31731036014592. Its totient is φ = 10569532014360.

The previous prime is 21146543424103. The next prime is 21146543424157. The reversal of 21146543424142 is 24142434564112.

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, 74179483 + ... + 74464009.

It is an arithmetic number, because the mean of its divisors is an integer number (1983189750912).

Almost surely, 2^{21146543424142} is an apocalyptic number.

21146543424142 is a deficient number, since it is larger than the sum of its proper divisors (10584492590450).

21146543424142 is a wasteful number, since it uses less digits than its factorization.

21146543424142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297543.

The product of its digits is 737280, while the sum is 43.

Adding to 21146543424142 its reverse (24142434564112), we get a palindrome (45288977988254).

The spelling of 21146543424142 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-three million, four hundred twenty-four thousand, one hundred forty-two".