21533251202 has 8 divisors (see below), whose sum is σ = 32312546112. Its totient is φ = 10762402500.

The previous prime is 21533251189. The next prime is 21533251219. The reversal of 21533251202 is 20215233512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105174 + ... + 2115377.

It is an arithmetic number, because the mean of its divisors is an integer number (4039068264).

Almost surely, 2^21533251202 is an apocalyptic number.

21533251202 is a deficient number, since it is larger than the sum of its proper divisors (10779294910).

21533251202 is a wasteful number, since it uses less digits than its factorization.

21533251202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223104.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 21533251202 its reverse (20215233512), we get a palindrome (41748484714).

The spelling of 21533251202 in words is "twenty-one billion, five hundred thirty-three million, two hundred fifty-one thousand, two hundred two".