21153456214 has 32 divisors (see below), whose sum is σ = 34974047232. Its totient is φ = 9515880000.

The previous prime is 21153456211. The next prime is 21153456227. The reversal of 21153456214 is 41265435112.

It is a self number, because there is not a number n which added to its sum of digits gives 21153456214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153456211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888514 + ... + 912010.

It is an arithmetic number, because the mean of its divisors is an integer number (1092938976).

Almost surely, 2^21153456214 is an apocalyptic number.

21153456214 is a deficient number, since it is larger than the sum of its proper divisors (13820591018).

21153456214 is a wasteful number, since it uses less digits than its factorization.

21153456214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23932.

The product of its digits is 28800, while the sum is 34.

The spelling of 21153456214 in words is "twenty-one billion, one hundred fifty-three million, four hundred fifty-six thousand, two hundred fourteen".