21032301142 has 24 divisors (see below), whose sum is σ = 33842200032. Its totient is φ = 9799326000.

The previous prime is 21032301139. The next prime is 21032301149. The reversal of 21032301142 is 24110323012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032301149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194734 + ... + 282817.

It is an arithmetic number, because the mean of its divisors is an integer number (1410091668).

Almost surely, 2^21032301142 is an apocalyptic number.

21032301142 is a deficient number, since it is larger than the sum of its proper divisors (12809898890).

21032301142 is a wasteful number, since it uses less digits than its factorization.

21032301142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477652 (or 477633 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21032301142 its reverse (24110323012), we get a palindrome (45142624154).

The spelling of 21032301142 in words is "twenty-one billion, thirty-two million, three hundred one thousand, one hundred forty-two".