20021001002 has 8 divisors (see below), whose sum is σ = 31000259712. Its totient is φ = 9687581100.

The previous prime is 20021000981. The next prime is 20021001029. The reversal of 20021001002 is 20010012002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20021001002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161459624 + ... + 161459747.

It is an arithmetic number, because the mean of its divisors is an integer number (3875032464).

Almost surely, 2^20021001002 is an apocalyptic number.

20021001002 is a deficient number, since it is larger than the sum of its proper divisors (10979258710).

20021001002 is a wasteful number, since it uses less digits than its factorization.

20021001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322919404.

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

Adding to 20021001002 its reverse (20010012002), we get a palindrome (40031013004).

The spelling of 20021001002 in words is "twenty billion, twenty-one million, one thousand, two".