21837996458 has 16 divisors (see below), whose sum is σ = 33018560064. Its totient is φ = 10831918560.

The previous prime is 21837996421. The next prime is 21837996463. The reversal of 21837996458 is 85469973812.

It is a self number, because there is not a number n which added to its sum of digits gives 21837996458.

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, 387641 + ... + 440387.

It is an arithmetic number, because the mean of its divisors is an integer number (2063660004).

Almost surely, 2^21837996458 is an apocalyptic number.

21837996458 is a deficient number, since it is larger than the sum of its proper divisors (11180563606).

21837996458 is a wasteful number, since it uses less digits than its factorization.

21837996458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54397.

The product of its digits is 26127360, while the sum is 62.

The spelling of 21837996458 in words is "twenty-one billion, eight hundred thirty-seven million, nine hundred ninety-six thousand, four hundred fifty-eight".