21030067144 has 16 divisors (see below), whose sum is σ = 40099705200. Its totient is φ = 10336812432.

The previous prime is 21030067109. The next prime is 21030067183. The reversal of 21030067144 is 44176003012.

It is a super-2 number, since 2×21030067144² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22277142 + ... + 22278085.

It is an arithmetic number, because the mean of its divisors is an integer number (2506231575).

Almost surely, 2^21030067144 is an apocalyptic number.

It is an amenable number.

21030067144 is a deficient number, since it is larger than the sum of its proper divisors (19069638056).

21030067144 is a wasteful number, since it uses less digits than its factorization.

21030067144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44555292 (or 44555288 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 21030067144 in words is "twenty-one billion, thirty million, sixty-seven thousand, one hundred forty-four".