21230100342 has 48 divisors (see below), whose sum is σ = 50198363280. Its totient is φ = 6431040000.

The previous prime is 21230100301. The next prime is 21230100373. The reversal of 21230100342 is 24300103212.

21230100342 is a `hidden beast` number, since 21 + 2 + 301 + 0 + 0 + 342 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 576334 + ... + 612062.

It is an arithmetic number, because the mean of its divisors is an integer number (1045799235).

Almost surely, 2^21230100342 is an apocalyptic number.

21230100342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21230100342 is an abundant number, since it is smaller than the sum of its proper divisors (28968262938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21230100342 is a wasteful number, since it uses less digits than its factorization.

21230100342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38749 (or 38746 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21230100342 its reverse (24300103212), we get a palindrome (45530203554).

The spelling of 21230100342 in words is "twenty-one billion, two hundred thirty million, one hundred thousand, three hundred forty-two".