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20021210012 = 22171094926891
BaseRepresentation
bin10010101001010110…
…110110101110011100
31220200022102211220202
4102221112312232130
5312000412210022
613110404003032
71306100322446
oct225126665634
956608384822
1020021210012
1185444a6461
123a69090478
131b70bc2a3b
14d7d047496
157c2a5a592
hex4a95b6b9c

20021210012 has 24 divisors (see below), whose sum is σ = 37102892400. Its totient is φ = 9420535040.

The previous prime is 20021209969. The next prime is 20021210057. The reversal of 20021210012 is 21001212002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021209975 and 20021210002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731087 + ... + 757977.

It is an arithmetic number, because the mean of its divisors is an integer number (1545953850).

Almost surely, 220021210012 is an apocalyptic number.

It is an amenable number.

20021210012 is a deficient number, since it is larger than the sum of its proper divisors (17081682388).

20021210012 is a wasteful number, since it uses less digits than its factorization.

20021210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37861 (or 37859 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021210012 its reverse (21001212002), we get a palindrome (41022422014).

The spelling of 20021210012 in words is "twenty billion, twenty-one million, two hundred ten thousand, twelve".

Divisors: 1 2 4 17 34 68 10949 21898 26891 43796 53782 107564 186133 372266 457147 744532 914294 1828588 294429559 588859118 1177718236 5005302503 10010605006 20021210012