20000021210 has 16 divisors (see below), whose sum is σ = 38769272136. Its totient is φ = 7384623168.

The previous prime is 20000021203. The next prime is 20000021221. The reversal of 20000021210 is 1212000002.

It can be written as a sum of positive squares in 4 ways, for example, as 5680787641 + 14319233569 = 75371^2 + 119663^2 .

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, 76923029 + ... + 76923288.

Almost surely, 2^20000021210 is an apocalyptic number.

20000021210 is a deficient number, since it is larger than the sum of its proper divisors (18769250926).

20000021210 is a wasteful number, since it uses less digits than its factorization.

20000021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153846337.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20000021210 its reverse (1212000002), we get a palindrome (21212021212).

The spelling of 20000021210 in words is "twenty billion, twenty-one thousand, two hundred ten".