21342005234 has 32 divisors (see below), whose sum is σ = 35357757120. Its totient is φ = 9580953600.

The previous prime is 21342005231. The next prime is 21342005249. The reversal of 21342005234 is 43250024312.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21342005231) 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, 572114 + ... + 608274.

It is an arithmetic number, because the mean of its divisors is an integer number (1104929910).

Almost surely, 2^21342005234 is an apocalyptic number.

21342005234 is a deficient number, since it is larger than the sum of its proper divisors (14015751886).

21342005234 is a wasteful number, since it uses less digits than its factorization.

21342005234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36506.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21342005234 its reverse (43250024312), we get a palindrome (64592029546).

The spelling of 21342005234 in words is "twenty-one billion, three hundred forty-two million, five thousand, two hundred thirty-four".