21053000002 has 8 divisors (see below), whose sum is σ = 31580409276. Its totient is φ = 10526196912.

The previous prime is 21052999969. The next prime is 21053000057. The reversal of 21053000002 is 20000035012.

It can be written as a sum of positive squares in 2 ways, for example, as 17918231881 + 3134768121 = 133859^2 + 55989^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51513 + ... + 211564.

Almost surely, 2^21053000002 is an apocalyptic number.

21053000002 is a deficient number, since it is larger than the sum of its proper divisors (10527409274).

21053000002 is a wasteful number, since it uses less digits than its factorization.

21053000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303092.

The product of its (nonzero) digits is 60, while the sum is 13.

Adding to 21053000002 its reverse (20000035012), we get a palindrome (41053035014).

The spelling of 21053000002 in words is "twenty-one billion, fifty-three million, two", and thus it is an aban number and an uban number.