21151443443006 has 16 divisors (see below), whose sum is σ = 31753974979584. Its totient is φ = 10566785591544.

The previous prime is 21151443442979. The next prime is 21151443443021. The reversal of 21151443443006 is 60034434415112.

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, 110617775 + ... + 110808821.

It is an arithmetic number, because the mean of its divisors is an integer number (1984623436224).

Almost surely, 2^{21151443443006} is an apocalyptic number.

21151443443006 is a deficient number, since it is larger than the sum of its proper divisors (10602531536578).

21151443443006 is a wasteful number, since it uses less digits than its factorization.

21151443443006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237535.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 21151443443006 its reverse (60034434415112), we get a palindrome (81185877858118).

The spelling of 21151443443006 in words is "twenty-one trillion, one hundred fifty-one billion, four hundred forty-three million, four hundred forty-three thousand, six".