20211001002 has 24 divisors (see below), whose sum is σ = 45694437984. Its totient is φ = 6444087144.

The previous prime is 20211000991. The next prime is 20211001003. The reversal of 20211001002 is 20010011202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20211001003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24409008 + ... + 24409835.

It is an arithmetic number, because the mean of its divisors is an integer number (1903934916).

Almost surely, 2^20211001002 is an apocalyptic number.

20211001002 is an abundant number, since it is smaller than the sum of its proper divisors (25483436982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20211001002 is a wasteful number, since it uses less digits than its factorization.

20211001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48818874 (or 48818871 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20211001002 its reverse (20010011202), we get a palindrome (40221012204).

The spelling of 20211001002 in words is "twenty billion, two hundred eleven million, one thousand, two".