20001320212 has 6 divisors (see below), whose sum is σ = 35002310378. Its totient is φ = 10000660104.

The previous prime is 20001320149. The next prime is 20001320243. The reversal of 20001320212 is 21202310002.

It can be written as a sum of positive squares in only one way, i.e., 19992828816 + 8491396 = 141396^2 + 2914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20001320192 and 20001320201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500165023 + ... + 2500165030.

Almost surely, 2^20001320212 is an apocalyptic number.

It is an amenable number.

20001320212 is a deficient number, since it is larger than the sum of its proper divisors (15000990166).

20001320212 is a wasteful number, since it uses less digits than its factorization.

20001320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000330057 (or 5000330055 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20001320212 its reverse (21202310002), we get a palindrome (41203630214).

The spelling of 20001320212 in words is "twenty billion, one million, three hundred twenty thousand, two hundred twelve".