21425132002 has 4 divisors (see below), whose sum is σ = 32137698006. Its totient is φ = 10712566000.

The previous prime is 21425131997. The next prime is 21425132041. The reversal of 21425132002 is 20023152412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15964069801 + 5461062201 = 126349^2 + 73899^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5356282999 + ... + 5356283002.

Almost surely, 2^21425132002 is an apocalyptic number.

21425132002 is a deficient number, since it is larger than the sum of its proper divisors (10712566004).

21425132002 is a wasteful number, since it uses less digits than its factorization.

21425132002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712566003.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21425132002 its reverse (20023152412), we get a palindrome (41448284414).

The spelling of 21425132002 in words is "twenty-one billion, four hundred twenty-five million, one hundred thirty-two thousand, two".