21004134002 has 8 divisors (see below), whose sum is σ = 31516004316. Its totient is φ = 10498799232.

The previous prime is 21004133957. The next prime is 21004134013. The reversal of 21004134002 is 20043140012.

It can be written as a sum of positive squares in 2 ways, for example, as 15785660881 + 5218473121 = 125641^2 + 72239^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625843 + ... + 1638710.

Almost surely, 2^21004134002 is an apocalyptic number.

21004134002 is a deficient number, since it is larger than the sum of its proper divisors (10511870314).

21004134002 is a wasteful number, since it uses less digits than its factorization.

21004134002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267772.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21004134002 its reverse (20043140012), we get a palindrome (41047274014).

The spelling of 21004134002 in words is "twenty-one billion, four million, one hundred thirty-four thousand, two".