21201833351842 has 24 divisors (see below), whose sum is σ = 37567960770960. Its totient is φ = 8895874132080.

The previous prime is 21201833351807. The next prime is 21201833351873. The reversal of 21201833351842 is 24815333810212.

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, 2851237992 + ... + 2851245427.

It is an arithmetic number, because the mean of its divisors is an integer number (1565331698790).

Almost surely, 2^{21201833351842} is an apocalyptic number.

21201833351842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21201833351842 is a deficient number, since it is larger than the sum of its proper divisors (16366127419118).

21201833351842 is a wasteful number, since it uses less digits than its factorization.

21201833351842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702483458 (or 5702483445 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 21201833351842 in words is "twenty-one trillion, two hundred one billion, eight hundred thirty-three million, three hundred fifty-one thousand, eight hundred forty-two".