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20010001002 = 2326312680609
BaseRepresentation
bin10010101000101100…
…000110001001101010
31220122112100101001020
4102220230012021222
5311440030013002
613105323433310
71305603126225
oct225054061152
956575311036
1020010001002
11853913aa12
123a65385836
131b6b799aa4
14d7b76a5bc
157c1a942bc
hex4a8b0626a

20010001002 has 16 divisors (see below), whose sum is σ = 40172172480. Its totient is φ = 6644638592.

The previous prime is 20010000889. The next prime is 20010001009.

It is a happy number.

20010001002 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (20010001009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6338727 + ... + 6341882.

It is an arithmetic number, because the mean of its divisors is an integer number (2510760780).

Almost surely, 220010001002 is an apocalyptic number.

20010001002 is an abundant number, since it is smaller than the sum of its proper divisors (20162171478).

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

20010001002 is a wasteful number, since it uses less digits than its factorization.

20010001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12680877.

The product of its (nonzero) digits is 4, while the sum is 6.

It can be divided in two parts, 2001000 and 1002, that added together give a palindrome (2002002).

The spelling of 20010001002 in words is "twenty billion, ten million, one thousand, two".

Divisors: 1 2 3 6 263 526 789 1578 12680609 25361218 38041827 76083654 3335000167 6670000334 10005000501 20010001002