21073919930 has 16 divisors (see below), whose sum is σ = 43352064000. Its totient is φ = 7225343952.

The previous prime is 21073919849. The next prime is 21073919941. The reversal of 21073919930 is 3991937012.

It is a super-2 number, since 2×21073919930² (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 7 ways as a sum of consecutive naturals, for example, 150527930 + ... + 150528069.

It is an arithmetic number, because the mean of its divisors is an integer number (2709504000).

Almost surely, 2^21073919930 is an apocalyptic number.

21073919930 is an abundant number, since it is smaller than the sum of its proper divisors (22278144070).

21073919930 is a wasteful number, since it uses less digits than its factorization.

21073919930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301056013.

The product of its (nonzero) digits is 91854, while the sum is 44.

The spelling of 21073919930 in words is "twenty-one billion, seventy-three million, nine hundred nineteen thousand, nine hundred thirty".