20021200002 has 64 divisors (see below), whose sum is σ = 44875347840.
Its totient is φ = 6616297728.
The previous prime is 20021199977. The next prime is 20021200021. The reversal of 20021200002 is 20000212002.
Adding to 20021200002 its reverse (20000212002), we get a palindrome (40021412004).
It is a Harshad number since it is a multiple of its sum of digits (9).
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8114373 + ... + 8116839.
It is an arithmetic number, because the mean of its divisors is an integer number (701177310).
Almost surely, 220021200002 is an apocalyptic number.
20021200002 is an abundant number, since it is smaller than the sum of its proper divisors (24854147838).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20021200002 is a wasteful number, since it uses less digits than its factorization.
20021200002 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3712 (or 3706 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 9.
The spelling of 20021200002 in words is "twenty billion, twenty-one million, two hundred thousand, two".