20022001002 has 24 divisors (see below), whose sum is σ = 43454180484. Its totient is φ = 6662742144.

The previous prime is 20022000979. The next prime is 20022001007. The reversal of 20022001002 is 20010022002.

It can be written as a sum of positive squares in 2 ways, for example, as 19706263641 + 315737361 = 140379^2 + 17769^2 .

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 (20022001007) 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, 927213 + ... + 948560.

Almost surely, 2^20022001002 is an apocalyptic number.

20022001002 is an abundant number, since it is smaller than the sum of its proper divisors (23432179482).

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

20022001002 is a wasteful number, since it uses less digits than its factorization.

20022001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876374 (or 1876371 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20022001002 its reverse (20010022002), we get a palindrome (40032023004).

It can be divided in two parts, 2002 and 2001002, that multiplied together give a palindrome (4006006004).

The spelling of 20022001002 in words is "twenty billion, twenty-two million, one thousand, two".