21323200142 has 4 divisors (see below), whose sum is σ = 31984800216. Its totient is φ = 10661600070.

The previous prime is 21323200141. The next prime is 21323200153. The reversal of 21323200142 is 24100232312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323200141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330800034 + ... + 5330800037.

It is an arithmetic number, because the mean of its divisors is an integer number (7996200054).

Almost surely, 2^21323200142 is an apocalyptic number.

21323200142 is a deficient number, since it is larger than the sum of its proper divisors (10661600074).

21323200142 is a wasteful number, since it uses less digits than its factorization.

21323200142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661600073.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21323200142 its reverse (24100232312), we get a palindrome (45423432454).

The spelling of 21323200142 in words is "twenty-one billion, three hundred twenty-three million, two hundred thousand, one hundred forty-two".