21342432102 has 16 divisors (see below), whose sum is σ = 42842376192. Its totient is φ = 7087892040.

The previous prime is 21342432101. The next prime is 21342432127. The reversal of 21342432102 is 20123424312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342432101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6561238 + ... + 6564489.

It is an arithmetic number, because the mean of its divisors is an integer number (2677648512).

Almost surely, 2^21342432102 is an apocalyptic number.

21342432102 is an abundant number, since it is smaller than the sum of its proper divisors (21499944090).

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

21342432102 is a wasteful number, since it uses less digits than its factorization.

21342432102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13126003.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21342432102 its reverse (20123424312), we get a palindrome (41465856414).

The spelling of 21342432102 in words is "twenty-one billion, three hundred forty-two million, four hundred thirty-two thousand, one hundred two".