21343234402 has 32 divisors (see below), whose sum is σ = 37137566592. Its totient is φ = 9010134144.

The previous prime is 21343234391. The next prime is 21343234417. The reversal of 21343234402 is 20443234312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801433 + ... + 827635.

It is an arithmetic number, because the mean of its divisors is an integer number (1160548956).

Almost surely, 2^21343234402 is an apocalyptic number.

21343234402 is a deficient number, since it is larger than the sum of its proper divisors (15794332190).

21343234402 is a wasteful number, since it uses less digits than its factorization.

21343234402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27082.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21343234402 its reverse (20443234312), we get a palindrome (41786468714).

The spelling of 21343234402 in words is "twenty-one billion, three hundred forty-three million, two hundred thirty-four thousand, four hundred two".