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21203030022 = 234723748219
BaseRepresentation
bin10011101111110011…
…001001000000000110
32000201200020112012020
4103233303021000012
5321410433430042
613423542304010
71350300532026
oct235763110006
960650215166
1021203030022
118aa0615309
124138a28006
131ccb9c0315
141051da3a86
158416a43ec
hex4efcc9006

21203030022 has 16 divisors (see below), whose sum is σ = 42415095360. Its totient is φ = 7066170792.

The previous prime is 21203029907. The next prime is 21203030099. The reversal of 21203030022 is 22003030212.

It is a super-2 number, since 2×212030300222 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203029983 and 21203030010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345772 + ... + 402447.

It is an arithmetic number, because the mean of its divisors is an integer number (2650943460).

Almost surely, 221203030022 is an apocalyptic number.

21203030022 is an abundant number, since it is smaller than the sum of its proper divisors (21212065338).

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

21203030022 is a wasteful number, since it uses less digits than its factorization.

21203030022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752947.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21203030022 its reverse (22003030212), we get a palindrome (43206060234).

The spelling of 21203030022 in words is "twenty-one billion, two hundred three million, thirty thousand, twenty-two".

Divisors: 1 2 3 6 4723 9446 14169 28338 748219 1496438 2244657 4489314 3533838337 7067676674 10601515011 21203030022