21343232042 has 32 divisors (see below), whose sum is σ = 35844125184. Its totient is φ = 9449532400.

The previous prime is 21343232041. The next prime is 21343232059. The reversal of 21343232042 is 24023234312.

It is not an unprimeable number, because it can be changed into a prime (21343232041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47333 + ... + 211959.

It is an arithmetic number, because the mean of its divisors is an integer number (1120128912).

Almost surely, 2^21343232042 is an apocalyptic number.

21343232042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21343232042 is a deficient number, since it is larger than the sum of its proper divisors (14500893142).

21343232042 is a wasteful number, since it uses less digits than its factorization.

21343232042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164794.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21343232042 its reverse (24023234312), we get a palindrome (45366466354).

The spelling of 21343232042 in words is "twenty-one billion, three hundred forty-three million, two hundred thirty-two thousand, forty-two".