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19852938709 = 193271319441
BaseRepresentation
bin10010011111010100…
…111100110111010101
31220020120210210002021
4102133110330313111
5311124323014314
613041553213141
71301655123532
oct223724746725
956216723067
1019852938709
11846851476a
123a208611b1
131b45097516
14d64963d89
157b2dbc324
hex49f53cdd5

19852938709 has 8 divisors (see below), whose sum is σ = 20904284480. Its totient is φ = 18802238400.

The previous prime is 19852938701. The next prime is 19852938737. The reversal of 19852938709 is 90783925891.

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

It is a cyclic number.

It is not a de Polignac number, because 19852938709 - 23 = 19852938701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19852938701) 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, 97572 + ... + 221869.

It is an arithmetic number, because the mean of its divisors is an integer number (2613035560).

Almost surely, 219852938709 is an apocalyptic number.

19852938709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19852938709 is a deficient number, since it is larger than the sum of its proper divisors (1051345771).

19852938709 is a wasteful number, since it uses less digits than its factorization.

19852938709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322731.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 19852938709 in words is "nineteen billion, eight hundred fifty-two million, nine hundred thirty-eight thousand, seven hundred nine".

Divisors: 1 19 3271 62149 319441 6069379 1044891511 19852938709