21253240034602 has 16 divisors (see below), whose sum is σ = 31922303091840. Its totient is φ = 10612481658768.

The previous prime is 21253240034561. The next prime is 21253240034633. The reversal of 21253240034602 is 20643004235212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2234203 + ... + 6891889.

It is an arithmetic number, because the mean of its divisors is an integer number (1995143943240).

Almost surely, 2^{21253240034602} is an apocalyptic number.

21253240034602 is a deficient number, since it is larger than the sum of its proper divisors (10669063057238).

21253240034602 is a wasteful number, since it uses less digits than its factorization.

21253240034602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660725.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 21253240034602 its reverse (20643004235212), we get a palindrome (41896244269814).

The spelling of 21253240034602 in words is "twenty-one trillion, two hundred fifty-three billion, two hundred forty million, thirty-four thousand, six hundred two".