21088846142 has 64 divisors (see below), whose sum is σ = 41198782464. Its totient is φ = 7867601280.

The previous prime is 21088846123. The next prime is 21088846147. The reversal of 21088846142 is 24164888012.

It is a junction number, because it is equal to n+sod(n) for n = 21088846093 and 21088846102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21088846147) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 261728 + ... + 332684.

It is an arithmetic number, because the mean of its divisors is an integer number (643730976).

Almost surely, 2^21088846142 is an apocalyptic number.

21088846142 is a deficient number, since it is larger than the sum of its proper divisors (20109936322).

21088846142 is a wasteful number, since it uses less digits than its factorization.

21088846142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71073.

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 21088846142 in words is "twenty-one billion, eighty-eight million, eight hundred forty-six thousand, one hundred forty-two".