21084557350 has 24 divisors (see below), whose sum is σ = 39268346040. Its totient is φ = 8422840320.

The previous prime is 21084557321. The next prime is 21084557363. The reversal of 21084557350 is 5375548012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235732 + ... + 312631.

It is an arithmetic number, because the mean of its divisors is an integer number (1636181085).

Almost surely, 2^21084557350 is an apocalyptic number.

21084557350 is a deficient number, since it is larger than the sum of its proper divisors (18183788690).

21084557350 is a wasteful number, since it uses less digits than its factorization.

21084557350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549144 (or 549139 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 21084557350 in words is "twenty-one billion, eighty-four million, five hundred fifty-seven thousand, three hundred fifty".